Sounds like many of us did
I noted that the image filename on the Russian site contained a number following the same general format as HiRise images, so I tried to search for it. No luck. In any case, the first part was two orders of magnitude higher than current publicly-available image IDs, making it unlikely to be even unreleased data.
The article contained both of the fundamental "sins" of anomalist claims: Lack of documentation about the image in question; and perceptual leaps of faith such as describing polygonal features as "pyramidal" and the apparent depression or cave opening as "door shaped".
There's nothing there. But I think the fact that many of us at least tried to verify the facts lays to rest the claim by anomalists that skeptics are close-minded.