  The XMM-Newton observatory shows evidence, with a 11$\sigma$ confidence
level, for seasonal variation of the X-ray background in the near-Earth
environment in the 2-6 keV energy range (Fraser et al. 2014). The authors argue
that the observed seasonal variation suggests a possible link with dark matter.
We propose an explanation which involves the Axion Quark Nugget (AQN) dark
matter model. In our proposal, AQNs can cross the Earth and emit high energy
photons at their exit. We show that the emitted spectrum is consistent with
(Fraser et al. 2014), and that our calculation is not sensitive to the specific
details of the model. Our proposal predicts a large seasonal variation, on the
level of 20-25%, much larger than conventional dark matter models (1-10%).
Since the AQN emission spectrum extends up to $\sim $ 100 keV, well beyond the
keV sensitivity of XMM-Newton, we predict the AQN contribution to the hard
X-ray and $\gamma$-ray backgrounds in the Earth's environment. The Gamma-Ray
Burst Monitor (GBM) instrument, aboard the FERMI telescope, is sensitive to the
8 keV-40 MeV energy band. The NuSTAR (Nuclear Spectroscopic Telescope Array) is
a NASA space based X ray telescope which operates in the range 3 to 79 keV is
also sensitive to higher energy bands. We suggest that the multi-year archival
data from the GBM or NuSTAR could be used to search for a seasonal variation in
the near-Earth environment up to 100 keV as a future test of the AQN framework.
