Azhar, on six, survived playing no shot at a Trent Boult delivery which swung in and New Zealand's referral was rejected. It wasn't until the 16th over that Pakistan's total exceeded the number of overs bowled.
Aslam departed at 21, edging medium pacer Colin de Grandhomme to the keeper, giving the debutant his seventh wicket of the match.
Boult's eight overs had cost just nine, Tim Southee's 11 went for 10, de Grandhomme had been positively frivolous with 14 off his seven overs, Neil Wagner's six cost five while legspinner Todd Astle bowled three overs for 11 without looking to threaten
Only Wagner's up and at 'em approach put some spark into proceedings.
The morning session belonged to Pakistan's seam trio, Sohail Khan, Mohammad Amir and Rahat Ali, who snapped up the last seven New Zealand first innings wickets in 23.5 overs for 96.
New Zealand had squandered a chance to press home their first-day advantage. Indeed, they only reached 200 through some late hitting from Southee and Wagner.
By tea on the third day only new cap Jeet Raval had scored more than 35, marking his debut with 55.