You could find some tools at pdfzone.com, and pdfplanet.com. However, the safest way is to use the commercial Acrobat software, which comes with a built-in exports feature. You could export to RTF (rich text format) and open these in Word. The export depends on whether the PDF file is password-protected. Also, PDF is quite sophisticated, so should your file have advanced features such as Javascripts, forms, or plugged-in features, these may not render correctly.
You could find some tools at pdfzone.com, and pdfplanet.com. However, the safest way is to use the commercial Acrobat software, which comes with a built-in exports feature. You could export to RTF (rich text format) and open these in Word. The export depends on whether the PDF file is password-protected. Also, PDF is quite sophisticated, so should your file have advanced features such as Javascripts, forms, or plugged-in features, these may not render correctly.