Hi, 

There are thousands of moth species in Maryland. It is difficult to tell for sure which it could be but it isn't a clothing moth or a pantry moth. It likely got trapped inside and doesn't seem like a household pest that you need to be concerned about. Moths area attracted to lights so if you open a door in the evening it could fly in. You can try to turn off outside lights when opening/closing doors to help keep them from accidently flying inside. 

Emily