I double Hamza Shahbaz or Mariam Nawaz even know how to use Word on a normal PC, let alone get and install beta software.
Shows a real lack of imagination.
"Actually we used to moonlight on Craigslist and routinely searched for fonts in leaked beta software to differentiate ourselves"
Now I'm being facetious.
But there are a lot of probable ways a font was added, ESPECIALLY for people that aren't good with computers. A toolbar added by a hacker group could have stolen fonts in it.
Any mention of the existence of such a toolbar would have helped them some bit. If the doc author was a font-nerd, that font would be none other than helvetica.