It happened around 12:45 a.m. on November 15, 2014, on the 900 block of North 4th Street in Philadelphia's Kensington section.
Police say the teenager was outside, waiting for someone to pick him up, when the three suspects approached.
Video shows one of the suspects, seemingly out of nowhere, deliver a violent blow to the victim's head. The teen was then punched repeatedly, before being thrown to the ground.
Seconds after hitting the street, one of the suspects lifts his leg and kicks the boy in the face.
The victim sustained a broken jaw and teeth during the attack.
If you have any information on the attack, police want to hear from you. To submit a tip, dial 215-686-8477 or text a tip to PPD TIP or 773847. You can also use this electronic form to submit a tip confidentially.