Run sha256sum and check VirusTotal to see if others have flagged it.
Use exiftool or strings to look for hidden comments or creator info. QSX.rar
If you can provide a or a description of the files inside , I can give you a much more detailed breakdown. Run sha256sum and check VirusTotal to see if
(e.g., finding a hidden flag, reverse engineering a payload, or recovering a password). finding a hidden flag
Check if the RAR is encrypted or uses "header encryption" (which hides the filenames until the password is entered).
(e.g., a specific CTF platform, a suspicious email, or a GitHub repo).