The HTC One is getting a Max variant to add some phablet flavor to the One portfolio and it seems that someone in China jumped the gun and published the core specs. There's also a new batch of photos of the device.
(http://cdn.gsmarena.com/vv/newsimg/13/09/htc-one-max-specs-image/gsmarena_000.jpg)
The specs image advertises a 5.9" 1080p screen, Android 4.3 Jelly Bean, a 1.7GHz processor (likely a Snapdragon 600 judging by the frequency), 2GB RAM, 16GB storage and a 3,300mAh battery.
Leaked photos of the HTC One Max
The main camera of the One Max is a 4MP UltraPixel camera but it's not clear if it will have optical stabilization or not (so far only the One has it, the One mini and Butterfly S don't) and a 2.1MP front-facing camera. The back camera is accompanied by an LED flash and what is reportedly a fingerprint scanner (http://www.gsmarena.com/htc_one_max_to_feature_a_fingerprint_scanner_on_the_back-news-6604.php).
UltraPixel camera and fingerprint scanner on the back