If you are looking for a specific document that was inside such a folder, it is safer to search for the specific PDF form name (e.g., "Autodichiarazione spostamenti") rather than downloading a compressed archive from an unknown source.
Bandi sulla piattaforma Sintel - ARIA SpA - Regione Lombardia c.o.v.i.d.7z
: Cybercriminals often used COVID-19 themed filenames to spread malware. If you received a file named c.o.v.i.d.7z or similar via an unsolicited email, it is highly likely to be a security threat. If you are looking for a specific document
: The .7z extension indicates a high-compression archive created with 7-Zip , a free and open-source file archiver. a free and open-source file archiver.