While the original file was likely an audio format (like .opus or .m4a ), it has been packaged into a .zip file, possibly for bulk sharing or storage. Security and Safety Review
If you are trying to find this specific file on your own device:
The digits 20210612 confirm the media was archived or created on June 12, 2021.
Check your phone's file manager under WhatsApp > Media > WhatsApp Audio .
Are you trying to a lost voice note from this date, or did you find this link on a public website ? About suspicious files | WhatsApp Help Center
WhatsApp does not naturally send media as .zip files. A zip file with a WhatsApp-style name hosted on a third-party download site is often used to disguise malicious attachments .
The "AUD" prefix typically denotes a voice note or an audio track sent via WhatsApp.
High. Be extremely cautious. If you did not personally create this backup or receive it from a verified contact, it could be a delivery method for malware or spyware .