RAR files can contain malicious scripts, macro-infected documents, or hidden executables. Opening the archive without inspection is risky.
Vendors sometimes distribute patches as named RAR files without user-friendly labels, especially through legacy update servers. The upd suffix confirms its nature. hrj01316473rar upd
Many businesses use automated backup solutions (like Veeam, Acronis, or custom scripts) that name archives using job IDs. A nightly differential backup could produce a file like hrj01316473rar upd as part of a sequence. RAR files can contain malicious scripts