This is a presentation given at the EUSecWest 2010 conference in Amsterdam on the 16 June about recent PDF vulnerabilities and malware, showing how a tool such as ExeFilter may be used to provide additional protection as a complement to antivirus engines.

Origapy is a Python interface to Origami, a PDF parser written in Ruby. It provides access to pdfclean.rb, in order to sanitize PDF files by disabling all active content (javascript, launch actions, embedded files, etc). Because Origami is a full PDF parser, it is much more effective than PDFiD (when sanitizing/disarming PDF files), but also quite slower.

PDF files may be used to trigger malicious content, as described here. PDFiD is a Python tool to analyze and sanitize PDF files, written by Didier Stevens. Here is PDFiD_PL, a version that I have slightly modified so that it can be imported as a module in Python applications (originally for ExeFilter).

pyxmldsig is a Python module to create and verify XML Digital Signatures (XML-DSig). This is a simple interface to the PyXMLSec library, aiming to provide a more pythonic API suitable for Python applications.

With Python 2.6+, that's quite simple:

print "{0:b}".format(i)

This article explains how many common file formats (DOC, XLS, PDF, HTML, XML, RTF, ...) may hide or trigger malicious code (virus, Trojan horse, ...) using their native features such as active content (macros, Javascript, etc). It was presented at the SSTIC symposium and OSSIR in 2003.

This is a Python course I have written to quickly teach Python to my colleagues and students, made of slides and samples for hands-on exercises.

This short article shows how ExeFilter can be used to disable JavaScript in PDF files, which is effective against many Adobe Reader exploits discovered in 2009, including the recent zero-day CVE-2009-4324.