Use CustomBuild to enable ClamAV.
https://kbhost.nl/knowledgebase/custombuild-on-directadmin/
vi /etc/freshclam.conf
Add:
DatabaseCustomURL http://www.rfxn.com/downloads/rfxn.ndb
DatabaseCustomURL http://www.rfxn.com/downloads/rfxn.hdb
DatabaseCustomURL http://cdn.malware.expert/malware.expert.ndb
DatabaseCustomURL http://cdn.malware.expert/malware.expert.hdb
DatabaseCustomURL http://cdn.malware.expert/malware.expert.ldb
DatabaseCustomURL http://cdn.malware.expert/malware.expert.fp
DatabaseCustomURL http://ruweb.net/whitelist_ruweb.ign2
freshclam
Add exclusion:
Place the signatures you’d like to ignore, each on it’s own line, within the file whitelist.ign2
/usr/local/share/clamav/whitelist.ign2
/usr/local/directadmin/plugins/site_scan/clamav/whitelist.ign2