If you have questions about how to use 7-Zip or how to write a basic automation script in AutoHotkey for a legitimate purpose, I would be happy to help with that.
All legitimate v7 releases publish an or SHA-256 hash. After downloading Auto-Fh3-v7-7z.7z , use a tool like CertUtil (Windows built-in) to verify integrity: Auto Fh3-v7-7z Tool Download