Simply having a .rar file on your computer is generally safe, as the contents are compressed and cannot run.
Ensure "Show file extensions" is enabled in your OS to make sure it isn't an .exe file in disguise. GOD-082.rar
Could you tell me or what you were expecting it to contain ? Knowing the context (e.g., a specific game or website) would help identify it more accurately. How to Open RAR Files on Windows, Mac, and Mobile - Avast Simply having a