If you rent, report it to maintenance. That's a safety issue.

If you own, the you will want to buy a manual planer if doing it by hand. That will be much easier than sand paper.

You can also try a washer, a penny, cardboard, paper...and put between frame and hinge to slightly tip door. Depends on where it rubs. if top rubs, you can add something to top hinge. if top side rubs, then bottom hinge. You need to have some space between door and frame on the other side of the top corner

picture helps