Please note that DWF is only a publishing format and the resulting converted CAD model will not have the full precision of the original and first of all it will be (by the principles of DWF) only a surface representation of the original 3D model. You can use a similar way to take the CAD model also to other CAD software. For the conversion DWF-> DWG, this tool offers a combination of DWF import to Autodesk Navisworks, and using the FBX format to transfer the 3D data from Navisworks to AutoCAD. And like you can digitize/vectorize/scan a paper drawing, you can also convert/recover DWF files back to DWG (using third party utilities) - but in both cases you will loose substantial amount of information, structure and precision of the original drawing.
If you are looking for a way to convert a DWF or DWFx file to an AutoCAD DWG model, look at the suggestions of the online tool for CAD format conversions. DWF files back to the DWG format: DWF is an 'digital plot' file.
How to convert 3D DWF back to an editable CAD model?
