Well based on this … no. Sure, it might look like a Martian (or maybe bigfoot?) striding across the hills, but it’s likely just to be a shadow on a rock – much like the famous ‘Face of Mars’. The rock in question here is actually quite close to the rover by all accounts, which would make the figure only a few inches high…
If you’d like to take a closer look at NASA’s original copy of the picture, then take a look here. But don’t take this too seriously, I’m only pointing it out for entertainment purposes! 
