Virustotal is one such site that has a massive database of checksums. I have no idea if they will share it or if you have to pay something. [1] There are also

Virustotal is one such site that has a massive database of checksums. I have no idea if they will share it or if you have to pay something. [1] There are also threat intel sites that manage databases of known bad things, but AFAIK they all cost money to access. [1] - https://www.virustotal.com/ https://www.virustotal.com/