Little bugs and dust over the baseboard of a room. More details in the description

Found in the wood baseboard of a room (Spain). Little (nearly invisible, my camera can't capture them) things moving. just seen 4 or 5, but it looks like the wood paint is broken or eaten and there's wood dust there.

Those black things aren't holes. But don't know what they are. The baseboard is a bit "inflated", biut not sure if it was that way from before. The house was reformed a year ago.