The incident happened after the man entered the park with four others to target rhinos, according to a parks service statement released Friday.
His family was notified of his death late Tuesday by his fellow beggars, and a search party led by Kruger's regional manager, Don English, set out to recover the body. Rangers scoured on foot and the police flew over the area, but due to failing light, it could not be found.
The search resumed Thursday morning and, with the help of added field rangers, what was left of his body was discovered.
"Indications found at the scene suggested that a pride of lions had devoured the remains leaving only a human skull and a pair of pants," the statement said.
Glenn Phillips, managing director of Kruger National Park, extended his condolences to the man's family
"Entering Kruger National Park illegally and on foot is not wise, it has many dangers and this incident is evidence of that," he warned. "It is very sad to see the daughters of the deceased mourning the loss of their father, and worse yet, only being able to recover very little of his remains."
The four individuals who joined the illegal hunt were arrested Wednesday by the South African Police Service and officers continue to investigate what has happened.