I'm puzzled as to why the nationality of 41 souls on board is stated as 'unverified'.
Advance Passenger Information System (APIS) requires a nationality to be stated in an SSR message sent to the airline, but I don't think Malaysia is one of the 20 or so countries that requires it.
A number of the passengers were on their way to Australia, which is an APIS country, and their PNRs would have contained this, others would not.