Old word file saved as PDF suddenly changed Font Acrobat Reader ver 24.2.21005.0

Hi all,

I have some old pdfs that are generated from word that all of a sudden changed font and looks like:

Some of the text have gotten "bigger" and on top of eachother. The files work well when i open them in a web browser but looks like above when i open them in Acrobat Reader ver 24.2.21005.0.

Does anyone know if this can be fixed without having a PRO version or having to resave all of the documents?

// DH