Or it is Russian and they intentionally formulated this as cartoonesque Russian, so that everyone says "this can't possibly be Russian, it's someone who tries to put the blame on Russia".

The problem is that if this comes from a government power, it is likely that they have the resources to use some professional translators and/or linguists to make it look whatever they want it to look like.

Anything here that is not backed by other data is just pure speculation.