1 of 5 what looks like poster found in the metalfields during seed of evil playthrough

So I was just wondering around looking for scrap at the metal fields following the “rumor” on volts 2 note and stumbled upon what looks like a poster in the back right corner along side of the train car and the wording on the screen says 1 of 5. Was wondering if anyone has seen this or found it before tried to upload a picture of it but I cant considering I made an account to figure out what it is cant find any info about the 5 “posters”