Attackers continue to target Adobe products because the software is widely used and not always upgraded with the latest Adobe updates. Security researchers have also been devoting a lot of time to finding vulnerabilities in the company’s software. While antivirus vendors push out signatures that can detect malware attempting to exploit vulnerabilities, experts warn that new malicious code is developed daily and not all attacks can be detected.

Adobe issued another advisory last Tuesday warning of ongoing PDF attacks targeting a zero-day vulnerability in Adobe Reader and Acrobat. Some security firms have detected limited email attacks containing malicious PDF files attempting to exploit a remote code execution vulnerability in Reader and Acrobat 9.2 and earlier versions.

Adobe has reportedly said it did not plan an emergency patch to repair the hole because it did not want to disrupt its quarterly update process.