[microtonal]

Due to the combination of these two factors, I bet this was written by a native English speaker who thinks he/she knows the mistakes a Russian would make.

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.

[crimsoneer]

Quite. If this was actually designed by a state actor, they have access to professional linguists who specialise in this sort of stuff. You're not going to figure out who it is unless they want you to, and it certainly won't be obvious enough for a cursory browse to identify provenance.

[NDlurker]

Why do people keep saying it's Russian or someone faking Russian? Clearly it was written to avoid identification by text analysis or whatever it's called.