ClamAV неофициальные вздохи

Используйте apt, чтобы узнать , что делают пакеты.

Вот пример:

$ apt show clamav-unofficial-sigs
...
 This package provides a script for updating the following sources of
 3rd-party clamav signatures until freshclamav gains support for such
 signatures.
 .
 The SaneSecurity/OITC signatures provide detection of phishing, spear
 phishing, fake lottery, ecard malware, casino, fake jobs, fake loans,
 419s, fake diplomas, porn, emailed malware and other general spam.
 .
 MSRBL signatures provide detection of image spam and general spam.
 .
 SecuriteInfo signatures provide various badware signatures,
 securiteinfo.com honeypot signatures, honeynet.cz signatures
 and French anti-spam signatures
 .
 MalwarePatrol provides detection of mail containing URLs to malware.