Do not extract the file yet. Upload it to VirusTotal to check it against dozens of antivirus engines.
Sites like Mega.nz or Discord attachments sometimes obfuscate filenames for privacy. nFszpN4gnHJnmaQa.rar
A is a proprietary archive format developed by Eugene Roshal. Think of it as a digital suitcase that holds one or many files in a compressed state to save space and make them easier to transfer. Do not extract the file yet