https://pdfgrep.org/
Probably a well-known tool already, but I bumped into it this morning and found it pretty useful.
(Someone -not me- already has a PR for your expected Emacs package to support this, of course.)
pdfgrep - search text in PDFs
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General talk about software - if the program is not in the repos, please links to the developer's page or github.
General talk about software - if the program is not in the repos, please links to the developer's page or github.
Re: pdfgrep - search text in PDFs
Nice. And it's in the Debian repos. (Arch and Alpine too)