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 command-line 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/163237/clamav-0.103.3.tar.gz
Source: https://packetstormsecurity.com/files/163237/Clam-AntiVirus-Toolkit-0.103.3.html