It happened around 3:00 Sunday morning in Girard Estates on the 1900 block of South 17th Street.
Authorities say the victim, a man in his 50s, was walking when he was approached by a group of men who demanded money.
When the victim refused, the suspects allegedly began attacking, kicking and punching him.
The victim suffered serious injuries but was able to get away.
Anyone with information is asked to contact Philadelphia Police at 215-686-TIPS (8477), text a tip to PPD TIP (773847) or through PhillyPolice.com.