Sky Deutschland says the Austria international is ready to leave VfB this month and keen on a move to Old Trafford.
Kalajdzic has a year on his contract and intends to move to United. He is now pushing for the move, knowing United have him on their shortlist.
The striker's choice, however, would not find the favour with Austria coach and former United interim manager Ralf Rangnick.
Rangnick feels Kalajdzic would be better served remaining with VfB at this stage in his career.