pdf2doc.bat

echo ON
echo PDF to docx
echo usage: pdf2doc FooBarBoo.pdf
echo This will generate: FooBarBoo-jpeg.docx (a docx with JPEG pictures of the PDF) and FooBarBoo-OCR.docx (a docx with OCR-ized content of the PDF)
cd %CD%

where /q gswin32.exe || set PATH=C:\win32app\ghostscript-9.27\bin;%PATH%
where /q soffice.exe || set PATH=C:\win32app\LibreOffice-6.1\App\libreoffice\program;%PATH%

:LOOP
if "%1" == "" goto END
set FILENAME=%1
set FILENAME=%FILENAME:~0,-4%
echo XXXXXXXXX %FILENAME% XXXXXXXXXXXXX

C:\win32app\ImageMagick-7.0.11-0-portable-Q8-x86\convert -density 300  %FILENAME%.pdf %FILENAME%-%%03d.jpg
C:\win32app\ImageMagick-7.0.11-0-portable-Q8-x86\convert  %FILENAME%-*.jpg %FILENAME%-jpeg.pdf
soffice --infilter="writer_pdf_import" --convert-to docx %FILENAME%-jpeg.pdf
:waitForJpegPdf
IF NOT EXIST %FILENAME%-jpeg.pdf (
  sleep 5
  goto waitForJpegPdf
)
soffice --infilter="writer_pdf_import" --convert-to docx %FILENAME%.pdf

:waitForOcrPdf
IF NOT EXIST %FILENAME%.pdf (
  sleep 5
  goto waitForOcrPdf
)

mv %FILENAME%.docx %FILENAME%-OCR.docx
rm -rf %FILENAME%-*.jpg
rm -rf %FILENAME%-jpeg.pdf

SHIFT /1

goto LOOP

:END

echo Job is finished

Update: sleep less ;-)