Saeed Ajmal been reported to the International Cricket Council for a suspect bowling action.
South Africa was penalised five runs for ball tampering on the third day of the second Test.
Leg spinner Imran Tahir grabbed five wickets to put SA in control of the second Test.
The 2015 World Cup will feature the 10 full member nations of the International Cricket Council plus Ireland.
Rivals have vowed to stage a fightback against Imran Khan's Tehrik-i-Insaf party.
Pakistan were bowled out for 156 in their first innings on day two in Centurion.