Now @Evleaks has posted an image on his twitter account which he claims to be Lumia 925 which essential an international version of Lumia 928. Specs are more or so same and main difference is Lumia 925 will be using Aluminum body rather than polycarbonate one.
It will run on Windows Phone 8 and will be powered by 1.5GHz dual-core Qualcomm Snapdragon Plus processor along with 1 GB of RAM, at back it has 8.7-megapixel rear PureView camera with optical image stabilization (OIS), a Xenon flash.
It do comes with Wireless charging capabilities, 2,000 mAh battery and NFC. It will be thinner than Lumia 920