  We present a multi-wavelength analysis of the dwarf Seyfert-2 galaxy
J$144013+024744$, a candidate obscured active galactic nucleus (AGN) thought to
be powered by an intermediate-mass black hole (IMBH, $M_\bullet \approx
10^{4-6} M_\odot$) of mass $M_{\bullet} \sim 10^{5.2}M_\odot$. To study its
X-ray properties, we targeted J$144013+024744$ with NuSTAR for $\approx 100$
ks. The X-ray spectrum was fitted with absorbed power law, Pexmon and a
physical model (RXTorus). A Bayesian X-ray analysis was performed to estimate
the posteriors. The phenomenological and the physical models suggest the AGN to
be heavily obscured by a column density of $N_{\rm H} = (3.4-7.0)\times10^{23}$
cm$^{-2}$. In particular, the RXTorus model with a sub-solar metallicity
suggests the obscuring column to be almost Compton-thick. We compared the
$2-10$ keV intrinsic X-ray luminosity with the inferred X-ray luminosities
based on empirical scaling relations for unobscured AGNs using $L_{\rm
[OIV](25.89\mu {\rm m})}$, $L_{[{\rm OIII}](5007 {\rm angstrom})}$, and
$L_{6\rm \mu m}$ and found that the high-excitation $[{\rm OIV}]$ line provides
a better estimate of the intrinsic $2-10$ keV X-ray luminosity ($L_{2-10}^{\rm
int} \sim 10^{41.41}{\rm erg s}^{-1}$). Our results suggest that
J$144013+024744$ is the first type-2 dwarf galaxy that shows X-ray
spectroscopic evidence for obscuration. The column density that we estimated is
among the highest measured to date for IMBH-powered AGNs, implying that a
typical AGN torus geometry might extend to the low-mass end. This work has
implications for constraining the black hole occupation fraction in dwarf
galaxies using X-ray observations.
