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Not a big deal. You can edit a PDF programmatically, a la pdfcpu [0] or similar.

PDF can embed scripts, but I haven't done this in a long time and I imagine that apps-in-PDF would expose wonky unmaintained code paths in a renderer.

https://helpx.adobe.com/acrobat/using/applying-actions-scrip...

Also search for "PDF JavaScript"...

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