Fluorination with xenon difluoride
The reaction as pictured above is incorrect, the nitro group is not reduced.  As you suggest this is (predominantly) an electrophilic aromatic substitution reaction.  

Usually $\ce{HF}$ is used as a catalyst in these reactions and the following equilibrium is established.

$$\ce{XeF2 + HF &lt;=&gt; XeF+ + HF2^-}$$

The electrophilic $\ce{XeF^+}$ is the reactive species forming a complex with the aromatic ring.  Xenon is expelled from the complex and the reaction proceeds to yield the meta-fluoro isomer as expected for an electrophilic aromatic substitution.  Some other products, such as substituted biphenyls, are usually formed in small amounts suggesting that some minor pathway (radical-cation?) is also in play.