Hibernians struggled to beat the bottom side in the Premiership despite having most of the possession.
Pembroke stunned their more fancied opponents with a goal after just three minutes when Arab left Hogg stranded.
It was only on the hour mark that Hibernians finally drew level through substitutw Varea.
Just as it looked as though Pembroke were heading for their first point of the season Kristensen got on the end of a Hibs freekick to seal the win in extra time.
Disappointment for Pembroke, massive relief for Hibernians.