This looks like a beetle of the family Anobiidae, subfamily Ptininae (formerly family Ptinidae). When it comes to species, although with reservations due to the quality of the images, I'll go for Ptinus fur (a.k.a. spider beetle) due to the shape/silhouette. The female is rounder with shorter antennae (your first two images should show a female), while the male (image three?) is thinner (more parallel-sided) with longer antennae. It usually (but not always) have pale spots/bands (invisible or absent on the images as far as I can see) on the elytra and also pale hairs on the prothorax. It is common indoors but unfortunately it usually doesn't make much harm - it might eat som old cookies or such stuff.