In general, a bad microwave should not cause paper outside of it to move around. Microwaves are designed to contain the energy they generate within the cooking chamber, preventing it from affecting objects outside the microwave.
If you notice paper or other objects moving around outside the microwave while it is in use, it could indicate a potential issue with the ventilation system or the fan within the microwave. Malfunctioning fans or inadequate ventilation could result in air movement that affects nearby objects.
It's important to note that if you suspect your microwave is malfunctioning or causing unusual effects, you should exercise caution and discontinue its use until the issue has been resolved. It's advisable to have a professional technician inspect and repair the microwave to ensure it operates safely and properly.