Female Silhouette Before the Washing Machine and Scratching at the Door

One time our washing machine broke, my dad and I went to the store, bought a new one, they hauled it up for us (fourth floor), and we left the old one in the hallway, between the toilet and the shower room (too lazy to drag it downstairs, put it off till tomorrow). It was far from white nights (not St. Petersburg, but the same latitude), but at night it was already light enough.
So, I get up at night, go to the kitchen to drink, drink some water, go back, and there before my eyes is the washing machine, and in front of it a female silhouette, that is, on the left and right you can clearly see the machine, but the shadow covers the middle (I attached an image, I can't draw, sorry). I'm like, oh, mom came out of the toilet, I raise my hands like I surrender (well, so I don't bump into her), and I step back a couple of steps, turn my head to the left and see my mom sleeping on the couch (she and dad had some disagreement, and they slept in different rooms). It starts to dawn on me, and without turning my head away from mom, I go into the living room and sit down on the couch next to her. I didn't wake her, sat like that for about five minutes, made sure no one was there? Yeah, went to my room.
In that apartment I immediately established a rule for myself that everything that can be explained is not paranormal, for example:
the door to the room suddenly slammed — it's a draft (and fuck it that all the windows in my apartment are closed),
knocks, noises, creaks — neighbors, or animals…
But the unexplained was — the sounds of a clock in the room (there were no mechanical ones in the apartment), my dog barking at a corner at night, and shadows. Though one case, I remember with scratching.
I was sitting again, playing on the computer (a real night owl), I hear someone scratching at the door, I got up, opened it (thought it was the cat), but there was nothing. Closed the door again, sat down to play. Then the situation repeats one to one. By the third time I already felt something was wrong. I turned up the sound on the computer, the scratching got louder. I got scared. By that time, I was already prepared and knew the "Our Father" (by the way, I never learned any other prayers), and started saying them out loud. On the third reading of the prayer, after the word amen, I heard a bang on the door and silence. I left the room about 15 minutes later. To my surprise, the cat was locked in the kitchen. And the dog (a Chinese crested), was sleeping in the living room, but to wake her I had to shake her for about two minutes (first time in my life I saw an animal sleep so soundly).