UPDATE [3.42pm]: From the press conference by Malaysian Inspector General of Police Khalid Abu Bakar:
The identity of the passenger traveling with a stolen Austrian passport: He is Eouria Nour Mohammad Mehrdead, 19 from Iran. He was traveling to Germany, where his mother had been waiting for him, with plans to migrate.
His mother got in touch with Malaysian police when he failed to arrive and confirmed that she had known that he was traveling with a stolen passport. Check on him found that he was 'not likely to be a member of any terrorist group'. He entered Malaysia on Feb 20.
https://my.news.yahoo.com/mas-aircraft-goes-missing--says-airline-023820132.html
Pouria nour mohammad mehrdad