  We propose a scalar dark matter model featuring a hidden gauge symmetry,
denoted as U(1)_X, with two complex scalars, Phi and S. In this framework, Phi
spontaneously breaks the U(1)_X gauge symmetry, while S serves as a viable dark
matter candidate. Particularly, the kinetic and direct mixings between the
U(1)_X and U(1)_Y gauge groups provide a portal between dark matter and the
Standard Model particles. These mixings offer a plausible explanation for the W
boson mass anomaly observed by the CDF Collaboration. We study the
comprehensive phenomenological constraints of this model from colliders and
dark matter detection experiments, including Z' searches at the LHC, the 125
GeV Higgs boson measurements, the relic density of dark matter and the indirect
detection of dark matter annihilation. By randomly scanning the parameter
space, we find that the regions where m_(Z') > 4750 GeV and m_(Z') < 4750 GeV
for g_x close to 1 remain viable and can be tested by future experiments.
