I would check the history of this house, if you have time. See if anything sticks out to you. Next. try and see if any of those areas look to be re-fabricated, painted over or look out of place. Try to see if certain times of day are when it happens. Establish a pattern. Then, try and record with video or audio it happening. Also... as odd as it may seem, simply being alone in the house and asking it to stop might help. I would not assume its bad in any way. Only accept it being evil/bad if you have no other choice or tangible proof.
It might be a friendly spirit tying to tell you it does not want you to go.
If you need help or want help, let us know where you are and we will do what we can.