Thank you for your input. Even tho I find this to be totally faisable, from what the cradle article provides, I cannot verify much:

• fars looks like it’s an Iranian outlet I personnaly don’t know if I can trust or not, regardless of mbfc
• the informed sources are not named
• I didn’t manage to find the documents mentionned

Apart from that at some point it mentions that Grossi said in Times of Israel that “We have seen some reports in the press. We haven’t had any official communication about this.”, but the linked article is about Iran stealing Israeli documents, not the other way around.

Anyways, if you or anyone has more on this, please share.