: A common red flag is if the source of the file directs you to a website to "complete an offer" or download a text file with the password. These are typically scams designed to generate ad revenue or distribute malware. Technical Reality of RAR Encryption
If you are trying to access the contents of this specific file, here is the technical breakdown:
: If you cannot even see the filenames inside the .rar file, the creator likely checked "Encrypt file names." In this state, the archive is a "black box" that provides no clues about its contents until the correct password is entered.
: Modern RAR files use AES-256 encryption. If the password is long or complex, "brute-forcing" (trying every combination) can take years or decades, even with high-end hardware.