Antivirus Zap is bundled with some 3rd-party program for improved detection results. Antivirus Zap is not a derivative work of ClamAV, it is only called in binary form via its command line interface.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with this program. If not, see https://www.gnu.org/licenses.
The source code for ClamAV is freely available from https://www.clamav.net/downloads