Automatic naming systems for user uploads.

Older versions of extraction tools (like older WinRAR builds) have had vulnerabilities where simply opening a malicious archive could infect your PC.

Random names help bypass simple filename-based filters.

how to find file info in not-first rar file? · Issue #56 · markokr/rarfile

Unless you specifically requested this file from a source you trust, treat it with extreme caution. The Risks of Random Archives

Downloading and extracting unknown archives can expose your system to several threats:

There is no official database for every file name on the internet, but "ky6jeged1j12.rar" appears to be an . These are frequently used by: