Interference,llegal pitch, or nothing?

[tankmjg24]

I was doing a middle school game (FED rules) last night between two teams that were not the greatest. R1 steals on the pitch and F3 yells out he is stealing. F2 hearing this stands up and lunges forward (yes the pitcher was throwing slow enough for this to occur haha) catches the ball and then throws to second. The batter never attempted to swing. When F2 caught the ball he was already standing up and his left foot was on top of home plate and his right foot about 6 inches behind home plate.

So here is my question, is this catcher's interference resulting in R1 to 2nd and batter to 1st, or is it an illegal pitch for the catcher being outside of his box resulting in R1 to 2nd, or is it nothing?

Thanks