Clam AntiVirus is an anti-virus toolkit for Unix. The main purpose of this software is the integration with mail servers (attachment scanning). The package provides a flexible and scalable multi-threaded daemon, a commandline scanner, and a tool for automatic updating via Internet. The programs are based on a shared library distributed with the Clam AntiVirus package, which you can use in your own software.
You can download it from the following link: https://packetstormsecurity.com/files/download/124809/clamav-0.98.1.tar.gz
Source: https://packetstormsecurity.com/files/124809/Clam-AntiVirus-Toolkit-0.98.1.html