  Analyzing the neutrino Yukawa effect in the freeze-out process of a generic
dark matter candidate with right-handed neutrino portal, we identify the
parameter regions satisfying the observed dark matter relic density as well as
the current Fermi-LAT and H.E.S.S. limits and the future CTA reach on gamma-ray
signals. In this scenario the dark matter couples to the Higgs boson at
one-loop level and thus could be detected by spin-independent nucleonic
scattering for a reasonable range of the relevant parameters.
