MailDefense v.3 protects email from malicious content in PDFs

February 25, 2004


"With the release of Adobe 6.0 Reader, a series of security vulnerabilities allows malicious code to be easily embedded in the .PDF file format," said Alex Shepson, CTO of InDefense, Inc., explaining the results of testing his company performed -- and a solution they've developed. The initial tests apparently revealed that "many antivirus scanners are not able to detect the MyDoom virus embedded in .PDF files read by the version 6.0 Reader, creating an easy entrance for malicious threats."

Mary Landesman, security consultant and guide for, adds a similar assessment:

"Adobe describes PDF files as 'the de facto standard for the secure and reliable distribution' of documents and forms. Even the NIST declares .PDF's the 'safest alternative'. With the release of Adobe Acrobat Reader 6.0 this is no longer necessarily the case. The decision to allow active content and embedded executables makes .PDF files every bit as risky as any other executable type file. Perhaps even more so, as it appears at least some antivirus scanners are unable to penetrate this format and cannot recognize the presence of even well-known viruses. In short, the release of Adobe Reader 6.0 presents a significant security issue where malcode is concerned."

As InDefense announced version 3.0 of MailDefense Advanced and MailDefense Gateway editions, providing "100 percent protection against known and unknown e-mail borne threats including viruses, worms, trojans and malicious code," Shepson said. "MailDefense systematically removes all malicious code, independent of format, from .PDF files allowing users to safely open .PDF file attachments with any version of the Adobe Acrobat Reader."

InDefense cites comments by Jim Elliott, CIO of United Way of the National Capital Area and an an early user of the 3.0 release of MailDefense:

"We've been concerned for some time about the ability of threats to enter our system via .PDF file attachments. We commonly exchange important information with our agencies using .PDF files and it's important for us to protect not only inbound communications, but outbound communications as well from any malicious code that could be embedded in .PDF files."

MailDefense Advanced and MailDefense Gateway protect at the server, desktop and e-mail gateway level, according to the company.

PDF In-Depth Free Product Trials Ubiquitous PDF

Debenu Quick PDF Library

Get products to market faster with this amazing PDF developer SDK. Over 900 functions and an equally...

Download free demo

Five visions of a PDF Day

In the world of PDFs or as we like to say Planet (of) PDF, a year isn't a real PDF year without an intense few days of industry knowledge sharing.

May 15, 2018
Platinum Sponsor

Search Planet PDF
more searching options...
Planet PDF Newsletter
Most Popular Articles
Featured Product

Debenu PDF Aerialist

The ultimate plug-in for Adobe Acrobat. Advanced splitting, merging, stamping, bookmarking, and link control. Take Acrobat to the next level.


Adding a PDF Stamp Comment

OK, so you want to stamp your document. Maybe you need to give reviewers some advice about the document's status or sensitivity. This tip from author Ted Padova demonstrates how to add stamps with the Stamp Tool along with related comments.