  PKS 2005-489 is a well-known, bright southern BL Lac object that has been
detected up to TeV energies. In a low-flux state it exhibits the expected
multiwavelength double-peaked spectrum in the radio -- $\gamma$-ray band. The
high-flux state shows extreme flux variations in the X-ray band with a
hardening as well as a peculiar curved feature in the spectrum. Thus far, PKS
2005-489 is the only source to exhibit such a feature. To study the X-ray
variability further, we obtained the first hard X-ray spectrum of the source
with NuSTAR. We compare quasi-simultaneous radio, optical, UV, soft and hard
X-ray, and $\gamma$-ray data of PKS 2005-489 to archival data in order to study
its broadband behavior. We find a very consistent quiet state in the SED, with
little variation in spectral shape or flux between the 2012 and 2020 data. A
possible explanation for the peculiar X-ray spectrum in the flaring state is an
additional component in the jet, possibly accelerated via magnetic
reconnection, that is not co-spatial to the low-flux state emission region.
