After reading Eric Romang's blog,I try to find a new way to deobfuscate malicious Acrobat JavaScript because using document.write() is some really dirty work.
1. Basic Methods to Deobfuscate Acrobat JavaScript
1.1 document.write()
Pros: using Firebug, Dev tools,
Cons:
can't recognize PDF-specific objects
dirty work(possibly)
read more.........http://elsonmath.blogspot.com/2013/04/acrobat-javascript-deobfuscation.html