File_1548317732.rar -

binwalk , strings , or CyberChef for data manipulation.

When you first attempt to open the file using a standard archive manager, it likely fails because the file header is corrupted or incorrect. Use the file command in Linux or a hex editor to inspect the first few bytes. file file_1548317732.rar file_1548317732.rar

Open the file in a hex editor like or 010 Editor . You will notice that the starting bytes do not match the standard RAR 5.0 signature. Correct RAR 5.0 Signature: 52 61 72 21 1A 07 01 00 binwalk , strings , or CyberChef for data manipulation