[SANS ISC] Simple PDF Linking to Malicious Content

I published the following diary on isc.sans.edu: “Simple PDF Linking to Malicious Content“: Last week, I found an interesting piece of phishing based on a PDF file. Today, most of the PDF files that are delivered to end-user are not malicious, I mean that they don’t contain an exploit to

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Is there a way to scan a pdf to ensure it doesn’t contain anything that could be a virus?

The answers to Can a PDF file contain a virus? show that clearly it can!
Sometimes we can be quite sure a certain pdf should not need to do anything sophisticated – for example a book in pdf form – so we wouldn’t expect them to contain emb… Continue reading Is there a way to scan a pdf to ensure it doesn’t contain anything that could be a virus?

What hidden metadata might be embedded in a PDF that is not visible "to the naked eye"?

I have edited a PDF in Acrobat, but I am wondering what metadata might be possible to discern from the end file if I send it to external parties. Where is the most comprehensive guide or utility to stripping not readily visible metadata fr… Continue reading What hidden metadata might be embedded in a PDF that is not visible "to the naked eye"?

What hidden metadata might be embedded in a PDF that is not visible "to the naked eye"?

I have edited a PDF file in Acrobat, which left some metadata and I am wondering:

What metadata might be possible to discern from the end file if I were to send it to external parties?

What actions would be required to be taken to strip … Continue reading What hidden metadata might be embedded in a PDF that is not visible "to the naked eye"?