The bash .sh file to find all pdf in current directory that has less that 3 fonts installed within it. Then move these pdfs to a subfolder named unscanned.
For next step, we can use Acrobat to do OCR over the subfolder.
#!/bin/zsh
#set -vx
for file in *.pdf
do
name=${file##*/}
base=${name%.pdf}
if ((`pdffonts "$name" | wc -l` < 5 )); then
echo "$name" "-> Not Searchable"
mv "$name" "./unscanned/"
else
echo "$name"
fi
done
echo "Done"