A modded APK is one that has had its game save or data modified in some way, such as by altering stats or deleting all files and starting over.
Do any corruptions to the file cause it to be considered a modded APK?
-No. A corrupted file could possibly be fixed with one’s backup data but this would not qualify as a true modification. The true modification component lies in the idea of alterations made from scratch where abnormalities exist within the programming code for it to take effect (e.g: edits, additions, deletions). These changes cannot just happen spontaneously because something went wrong with storage space or archive errors and so on. These are intentional actions taken by people other than the original creator of the game.