Alright, back from "meeting".
Before i left i followed
>>31004233 advice, I downloaded a bunch of random safe images from my mates group chat and renamed them to the same as the ones from the filebox just to be safe.
Got a work whatsapp and told HR that my mate sent it through to me via that and accidentally opened it, IT dude was there an d probably knew i was bull shitting but didn't say anything, got asked to ignore non-urgent personal correspondence to a minimum and went along my way.
>posted from my work computer.