El Kaabi, 24, had never featured for the Moroccan senior national team until his debut in the opening match against Mauritania on January 13.
In Sunday's final of the tournament for home-based African footballers, Morocco will now face either Nigeria or Sudan who meets in the second semi-final later on Wednesday in Marrakech.
He is now the top scorer of the competition with eight goals.
Pinnick commended the players for their victory against Sudan in Marrakech, but told them that they can not afford to go this far only to go down to the host country.
The former - a fine playmaker with Raja Casablanca - delivered arguably the individual performance of the tournament in the Atlas Lions' 4-0 rout of Mauritania.
"The team have done well to qualify for the final of the competition and they can prove their mettle against the hosts in the final and win the competition", he said.
Despite being closed down by two Libyans on the left, Bencharki still managed to squeeze the pass to El Kaabi to finish with a superb header.
USA to impose arms embargo on S. Sudan to end war
South Sudan descended into war in mid-December 2013 when Kiir accused his former deputy Riek Machar of plotting a coup. The U.N. secretary-general last month warned of the imposition of "consequences" over the ongoing fighting.
"We know the Moroccan team is a very good team playing at home, moved by the crowd".
Though he has just one goal to his name in the tournament, he could cause havoc if given the opportunity especially when all attention is focused on El Kaabi.
El Kaabi extended his scoring record with a simple tap in after six minutes of the first 15 minutes of the extra time giving Morocco a 2-1 lead before Walid El Karti's penalty that sent Morocco through to the finals.
The Morocco vs Nigeria match is available in most countries through the rights holders' online platform, if they have one.
"President Muhammadu Buhari (GCFR) has been following with keen interest your campaign here, and the only way to compensate him for his support and encouragement is to go back home with the CHAN trophy". Nigeria on the other hand scored seven goals and conceding two goals.
Gabriel Okechukwu scored Nigeria's winning goal in the 16th minute.