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The first half started brightly with both goalkeepers being forced into making early saves, but the game quickly settled down into a scrappy midfield battle.
However, the substitute was only able to poke the ball wide, much to the frustration of his coach.
Former Tottenham Hotspur forward Mounir El Hamdaoui then went close for Morocco, firing just wide from an acute angle.
Angola pushed forward in search of a winner late on and Manucho was narrowly off target with a diving header, but the game ended goalless.
Earlier in the day, South Africa and Cape Verde also played out a 0-0 draw.