After fluent studying of a format and specifics of this problem the program for executables injection into pdf files has been developed. Certainly, there will be a warning at pdf file opening, however, there is a possibility to display any text in the warning window (actual for Acrobat Reader 9.*).
[+] Custom warning text
[+] Custom temporary vbs name (used for exe file creation)
[+] Custom temporary exe name
[+] Exe deletion after specified delay
The program interface is extremely simple and looks like this:
Download: Exe2Pdf (password: coder.pub)