It could be a piece of a "scene" release (games, movies, or software) from an obscure group [1].
Because it is a .part05.rar file, it is useless on its own. It represents a dependency. To unlock the secrets held within, one must find parts 01 through 04 (and possibly 06+) [1]. sc24717-MW5MROR.part05.rar
This file is a snapshot in time, often found in the shadowy corners of file-sharing sites, deep-web forums, or old FTP servers [1]. What could it be? It could be a piece of a "scene"