Even if the file is not a virus, it is likely a cracked version of that has been modified to report itself as "CS8" or simply a broken beta build. These "repacks" are notoriously unstable. They crash frequently, corrupt save files, and lack GPU acceleration support found in legitimate versions.
It looks like you're searching for a very specific version of , but the keyword "CS8" is a bit of a mix-up in software history.
While the 18.0.0 build was revolutionary at launch, using it today presents some challenges:
The search for is a wild goose chase. The version is a fabrication of software piracy circles. While the allure of a "Final" 64-bit version might be tempting, the security risks and software instability make it a poor choice for any serious creative professional.