Contain Match no hits, Contain does

Hello,
I have some pdfs from Pinterest, the invoices.
If I do contents - contain it does find e.g. 'Date:'
but when I do contents - contain match, then it can't find 'Date:'.
When I preview the file, all the text seems to be in inverse order, so 'Date' becomes 'etaD'.
Also the invoice date of 06/30/2022 is shown as 2202/03/60 in the preview.
I can get the individual numbers, but I don't think I can correct that in the correct date and then determine which quarter that was. Right?
So in short, the preview sees all characters in reverse but contain function works on the correct words, but contain match not.
Any ideas are highly appreciated.
I have some pdfs from Pinterest, the invoices.
If I do contents - contain it does find e.g. 'Date:'
but when I do contents - contain match, then it can't find 'Date:'.
When I preview the file, all the text seems to be in inverse order, so 'Date' becomes 'etaD'.
Also the invoice date of 06/30/2022 is shown as 2202/03/60 in the preview.
I can get the individual numbers, but I don't think I can correct that in the correct date and then determine which quarter that was. Right?
So in short, the preview sees all characters in reverse but contain function works on the correct words, but contain match not.
Any ideas are highly appreciated.