A last-gasp Korean attempt to exert pressure on the rival citadel led to a Pakistan counter-attack that earned them a penalty corner with just 28 seconds left for the hooter.
Abdul was allowed space by the Korean defenders to take a step forward and sent in a low shot that went through a few sticks to sound the boards and spark celebrations in the Pakistan team.
The Koreans dominated the possession but failed to convert it into goals and even muffed six penalty corners.
Pakistan had earlier failed to make use of two penalty corners and were forced to wait until the dying seconds for the match-winner.
Pakistan coach Khawaja Junaid was delighted at the turn of events and praised his players for maintaining structure in their game even when under persistent pressure from the Koreans.
He said Pakistan had squandered away the lead in yesterday's match against Malaysia, but this victory had out them back on track.
South Korea team coach Paul Lissek expressed his annoyance at the award of the penalty corner, but said his players should not have been too ambitious in the last minute.
"Because I am annoyed at the decision to award the last penalty corner, I won't say anything other than that I through the reverse shot by the Pakistani striker was a dangerous shot and the umpire should have blown for foul rather than award a penalty corner," said Lissek.
Lissek said there was a lot his young side could do in this tournament, despite losing the first outing through a last minute goal.
"Inexperience cost us this game, but we have a lot to play for," said Lissek, asserting that his boys would give India a tough contest tomorrow.
In London, India went on to make their first appearance
In another match, hosts Malaysia outplayed China 5-1 for their second successive victory and climbed to the top spot in the round-robin league standings after two days with a maximum six points.
China's failure to defend against Malaysian penalty corners was the key element of the contest as four of the Malaysian goals came from penalty corners.
Haziq Samsul twice capitalised on penalty corner rebounds (in the sixth and 20th minutes), while Shahril Saabah did so in the 37th. Only Firhan Ashari capitalised with a direct penalty corner shot for Malaysia in the 54th minute.
