This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
You are really in the malware area with that request. I hear the bad guys are working on that and there are rumours that they have cracked the problem; I wouldn't be surprised, those people are very well funded these days.
But don't expect anybody at this forum to point you towards their results. We don't condone that here.
I’ve looked at a lot of different solutions, and in my humble opinion Aspose is the way to go. Here’s the link: http://aspose.com