Technically, I would definitely call this “spyware” rather than the run-of-the-mill adware if the adware uploads screenshots!
A new adware has been discovered that performs a severe privacy breach by uploading a screenshot of the user’s active windows to a server under their control. This means that any info on the screen, whether it is a tax return, password manager, or corporate secrets is now available the adware company.
Source: Adware uploads Screenshot of your Active Windows without your Permission