ClamAV does not start

Error :

Starting clamd: LibClamAV Error: cli_loadmd5: Problem parsing database at line 11703
LibClamAV Error: Can’t load daily.mdb: Malformed database
LibClamAV Error: cli_tgzload: Can’t load daily.mdb
LibClamAV Error: Can’t load /usr/share/clamav/daily.cld: Malformed database
ERROR: Malformed database

Fix:

This means that the DBs are corrupted. Go to /usr/share/clamav/ and empty the following files:
daily.cvd
main.cld
mirrors.dat

Then, run the following command to download fresh copies for your DBs:

/etc/cron.daily/freshclam

and restart ClamAV.

If the above solution does not work then reinstall ClamAV from WHM > cPanel > Manage Plugins