engine - 6:08 pm on Aug 1, 2007 (gmt 0)

Security vendors have warned e-mail users to be as vigilant about PDF attachments as they would for other documents, after seeing a sharp rise in spam embedded within PDF documents. E-mail security vendor Messagelabs reports that PDF's made up 20 percent of image-based spam messages in July, up 10 percent on the month prior. Image-based spam makes up around 22 percent of total spam, the company said. The security company believes attackers are using the PDF format due the fact that it more easily bypasses antivirus and anti-spam filters, and that users tend to trust the authenticity of a PDF over other types of documents, even if they don't recognise the sender.

PDFs Can't Always Be Trusted [zdnet.com.au]

Once again, take care, especially with the pdf spam going round.