Can the Benjamin marauder .25 caliber kill a hog or a deer?

No, not likely. The Benjamin Marauder .25 is an air rifle. While accurate to 100 yards, it pushes only 900 ft/lbs. It would be foolish to try to take down a wild boar, and likely wouldn't penetrate the hide of a hog or deer.

Might be okay or squirrel or rabbit.