How:

• Instead of passing random arguments I carefully craft each argument for each native function call.
• Using app.SetInterval instead of for loop so there is time for page rendering.

Dependencies:

• https://github.com/MarioVilas/winappdbg
• https://github.com/gdelugre/origami
• enable pageheap
• 32bit python
• capstone

Usage:

• Open js.pdf with Adobe Acrobat a console would appear. Paste the code inside init.js into the console and execute => save as template.pdf.
• Template would contain many different type of Fields.
• ruby addjs.rb template.pdf fuzzer.js trusted/fuzz.pdf
• python fuzzer.py

TODO

• Mutate template.pdf to look for file format bugs.
• Do the same for annotation.