The purpose of this site is to show how the groups in Adobe Illustrator can be revealed. This does not necessarily mean the document is not real. There could be many reasonable explanations for why the grouping gets revealed in Illustrator. Many people think that this apparent internal grouping in the document means that it was assembled rather than scanned. If this is true, the document could be declared fake.
After additional research, it appears some scanning software will attempt to isolate words within the image to facilitate optical character recognition. It appears very likely that is what is going on here.
After releasing the clipping mask, the groups below the layer are revealed. These group could be named, but are not. The big question here is how Adobe Illustrator determined these groups exist. It is possible it uses some logic to derive common groups of pixels, but these grouping seem way too specific. Logic could also have been used during the scanning process.