The teenage girls filmed assaulting a disabled man in Adelaide's northern suburbs have been identified by police investigating the shocking incident.

In disturbing vision provided to 9News, Jason Haldenby is shown lying on the ground, cradling his head and crying as the offenders kick and punch him while screaming at him.

The 18-year-old who has an intellectual disability, told 9News he is now afraid to leave his house after the three girls attacked him and demanded access to his mobile phone.

Jason Haldenby said seven other people watched and laughed as he was attacked by three teen girls. (9news)

“I’ve been bullied my whole life, primary school through to high school,” Mr Haldenby said.

He told 9News he was asked to meet two of the girls at Elizabeth Train Station on Wednesday afternoon to discuss "rumours."

When he arrived, he was dragged to a dirt path and beaten.

After about one minute, Mr Haldenby attempts to stand up as the female attackers demand the password to his mobile phone.

He is then beaten to the ground again by one of the attackers, who unleashes a tirade of foul language at her victim while the other girls are heard laughing at what is unfolding.

Confronting footage shows three teenage girls attacking a disabled man demanding the password to his phone. (Supplied)

Mr Haldenby told 9News up to seven other teenagers were watching the attack, with some filming it and others laughing at him, but nobody attempted to help.

In the vision, one of the attackers appears to be wearing a Playford International College uniform.

Police now have some of the attackers contact information and are now speaking with them about the attack.

It is not yet known what action South Australia Police investigating the attack will take.