Brakes

i'd suspect a bad booster to start. but i'd bet there's other forces at play here...

after that we'd need more info: has it been sitting, when was the last time the brakes were serviced (flush & bleed), has any work been recently done-- specifically brakes, but other things apply as well, is everything bone stock, what else can you tell us: have you had the car a long time? did you just buy it? is this a new problem that just suddenly cropped up or an ongoing issue?