Flatbed scanner, as someone else said, would be best.
For a camera take the photo with the highest focal length you can (biggest zoom lens on your phone). Fill the frame as little as possible (distortion gets worse as you get closer to the edges). Both GIMP and Photoshop have filters to remove lens distortion. It would help to put two straight edges, (one horizontal, one vertical) near the edges of the photo. When you remove the lens distortion properly these lines will become straight.
You could also try photogrammetry to get a rough model to use as a reference.
You can also report this crypto scam to Google where the scam site is hosted by click that little i button in the bottom left corner of the screen.