The rock looks about 7 ft tall (maybe a little bigger all though its hard to say). A 7 ft tall boulder is about 10 tons. You have to take into account the volume of the rock. We cannot say for certain however.
The link above is about a 7 ft tall rock that weighs 10 tons.
Look at that completely average sized pedestrian standing next to the boulder. We'll say the average size of a human is 5-6 feet tall, and you can stack three of him to make the boulder's height. It's more like 16 feet tall, never mind the fact that it's 10 times thicker than the one in your link.
The boulder looks like it is sitting on top of rubble to me. The pedestrian doesn't look like it is on the same rubble as the rock. I was more so comparing it to Ultimate cap who is on the same ground as the rock.
You're talking about the scan? Oh I thought you were referring to the real life boulder.