Is it possible for a person to become Hypocrite(Munafiq) without himself knowing so?

It is clear that in today's time all those who are Muslims irrespective of sects really believe Muhammad (pbuh) as a prophet hence they can't be the kind of Munafiq(Hypocrite or double-crosser) at the time of the Prophet (pbuh). But we also find such instances during the life of Prophet (pbuh) of companions who also believed in the Prophet (pbuh) by their hearts but became a bit lazy and did not go to Jihad which caused their boycott, accused Prophet (pbuh) of unfair war spoil distribution etc.They were found not to be hypocrites like the other hypocrites who just showed off their belief in Muhammad (pbuh) but only erred and disobeyed some commands of the Prophet (pbuh) (say like not going to Jihad). So even in the current time, is it possible for a person to become Munafiq while believing in Muhammad (pbuh) as a Messenger?