It was possible but I am thinking that how the Afghanistan played with a good management and were playing in a good way. So they could chase 300 digits too. But fortunately Pakistan didn't go up 300 runs and Afghanistan played and easily chase the target of 282 runs. This defeat broken many hearts and the nation was not expecting this loss by the way.
Both Pakistan and Afghanistan are having 4 points each from 5 matches. Australia is having the same points, but they have played one match less. And their next match is against Netherlands. At this point, India, New Zealand and South Africa are having maximum chances of qualifying to the semi-finals. The question is about the fourth team. IMO, it is going to be Australia. But Pakistan fans can expect for a miracle and if they can win 3-4 of the remaining 4 matches then it maybe possible for them to overtake Australia in points table.