Older versions of WinRAR had vulnerabilities (e.g., CVE-2023-38831) that could allow malicious code to run, though modern versions (6.23+) are patched.
The RAR format allows for recovery of damaged archives, which is not commonly found in ZIP files. Cons
If you did not intentionally download this from a legitimate site, do not open it. Always scan RAR files with antivirus software before extracting.
kind of content were you expecting inside (e.g., software, documents, images)? I can help determine if it's safe to open. How to Open RAR Files on Windows, Mac, and Mobile - Avast