The comic book marketplace
Logs or crash reports sometimes capture screenshots with these naming conventions.
To get more details, you can try checking the or metadata on your computer, as that might reveal which application created it or when it was saved.
This specific string of characters is a . These are often automatically generated by operating systems or applications (like macOS, iOS, or specialized software) to give a file a unique name that won't conflict with others. If this file is on your device, it likely came from:
Many apps rename images to UUIDs when saving them to a cache or database.