clamxav

Install command: 
brew install --cask clamxav

Name: ClamXAV

Anti-virus and malware scanner

https://www.clamxav.com/

Cask JSON API: /api/cask/clamxav.json

Cask code: clamxav.rb on GitHub

Current version: 3.9.1,11136

Requirements: macOS >= 10.11

Analytics:

Installs (30 days)
clamxav 26
Installs (90 days)
clamxav 110
Installs (365 days)
clamxav 556