Joe Belfiore, manager of all things Windows Phone, has announced on Twitter that a new version of PDF Reader is available for Windows Phone 8 owners. The app now supports password protected documents, as well as those set as 'read-only'. Released back in November, it's good to see Microsoft further developing the official PDF app for the platform.
As well as the two new features listed above for opening documents, PDF Reader also sports some improvements and bug fixes. You can download PDF Reader from the Windows Phone Store.