Arxiv isn't peer-reviewed, but many of the papers there are preprints of papers that are or will be peer-reviewed in "real" journals.
But here's the paper in question:
http://arxiv.org/abs/1409.1837
There's nothing there suggesting that it's been submitted to a refereed journal.
BUT
The paper is titled "Back-reaction of the Hawking radiation flux on a gravitationally collapsing star II". There is, quite logically, a part I, which will be in the November "issue" of Physics Letters B (Volume 738), which is peer-reviewed.
EDIT: Also, the authors aren't from some dubious Indian/Chinese universities but UNC Chapel Hill and U Toronto.