Stuck .pdf file on desktop

I have a Preview .pdf file on my desktop that is stuck. I can't move it, I can't delete it. When I try to put it in the trash I get a message saying that it "can't be moved to the trash because it can't be deleted." I can click on the file and select it, but from the Finder I can "get info" or perform any other action. I can open the file from the Preview App but can't change it's name.

Does anyone have an idea of what the problem could be? 😕