Best way to convert xml or pdf to doc (or docx) file

Hello. I want to create a doc file from xml or pdf.

1. My XML has elements with style, that I parsed im to HTML, but some styles attribues doesn't work on MS Word and document isn't aligned. How to fix it?

2. I have a pdf with same elements in xml. Is any free library or any other way to convert this PDF to .doc-file (or docx)? I have ItextSharp, but I can't see that he has this solution.

Thanks.