If you have Soda PDF, you can right click on a DOC file and in the Soda PDF menu pick Convert to PDF. Your file will open up in Soda PDF as a PDF.
Inside all versions of Soda PDF is the Create Module. Open this and choose From Any File.
Click on Browse. A browse window will open where you can find your DOC file. Once you have selected your file it will open in Soda PDF.