For this you'll need a second controller. (Online used to be a thing, but Fifa 12 servers have shut down so I'm expecting inviting a friend won't work).
You can either follow the instructions below, or try a co-op match with someone. Not sure if it'll unlock though as I haven't tried it, but here's what worked for me:
Go to the practice area part by pressing
on the main menu.
Press select
on the controller and a little menu should pop up on the top left. Press practice set piece and make sure it's on free kick and attacking team before pressing advance. Move the ball by tilting L3
into the direction of where the ball is just outside of the box, then press
to advance.
Get the player 2 controller connected and put them on the away team, the opposite to you.
Now all you have to do is purposely hit the 4 players forming a wall repeatedly. Try to aim for your player.
It took me a couple more attempts than expected, but I finally unlocked it.