If you tell me this file was associated with (e.g., a specific game mod, a tool, or a leaked database), I can help you identify its intended "feature" or provide a safer alternative. How to Open RAR Files on Windows, Mac, and Mobile - Avast
Because "30.rar" is a generic name, its content varied depending on who uploaded it. However, in the context of anonymous sharing sites like AnonFiles, such files are frequently flagged for specific risks:
If it was linked in a forum or chat for a specific "feature" (like a game mod or software crack), it is likely a malicious payload.