Pitch up was probably due to the go-around call, however it takes between 5 & 8 seconds for the engines to reach full throttle after being commanded to do so from idle.
I read here somewhere that the engines had only reached 50% throttle at the point of impact. So whilst the nose it up, there's considerable time before the thrust comes on...
If the pilot knew he was going to crash, he may have planned a more level angle of attack, but since he was intending to abort the landing altogether and gain altitude as quickly as possible the high angle resulted in the tail striking the wall.