Obiang started the fixture, earning his second cap for Equatorial Guinea since declaring for the country last year, and helped the team to take a 2-1 lead at half-time. Sudan took the lead through Mohamed Mukkhtar but two penalties, tucked away by captain Emilio Nsue, gave the away side the advantage.
Pablo Ganet added a third for Equatorial Guinea four minutes after the restart, before Obiang struck to secure an emphatic win.
Despite the victory, Equatorial Guinea did not qualify for the 2019 AFCON Finals in Egypt after finishing third in Group A with six points from six matches.
Hammer Pedro Obiang 85th minute goal Equatorial Guinea v Sudan pic.twitter.com/9AW0fU0DGM
— West Ham Football (@westhamfootball) March 23, 2019