Based on the filename structure , this appears to be a fragmented RAR archive file (part 2 of a multi-part set) generated around December 23, 2022. 1. File Anatomy Analysis Z145346...: Likely a unique ID or project code.

If this file came from an unexpected email, I strongly recommend deleting it. If you need help identifying what type of file it might be, could you tell me ?

Secure, split transfers of sensitive documents.