I think it's fair to say those brands will source from the cheapest, scummiest places and it doesn't matter what "certificate" sticker is on the box.
But it is so hard to avoid them where I live :/ Even the fairtrade, vegan and ~~responsible~~ green washed products are from those 3...
A PowerPoint, word document or even a text file or picture. There is only a description in the file of what it holds and it's up to the program that reads it, how it will visualize or interpret it.
A word document or PDF would be the closest.