If you wanna save these complicated steps and find a easy way, you can google PDF to DWG Converter and you will find many useful tools, or google how to convert PDF to DWG to get instructive articles. i know a good pdf converter but i don't know whether it can be applied in pdf to dwg conversion. you can have a check.
You can use this link to download the free tool you need. http://pdf_to_dwg_pdf_to_dwg_converter.en.downloadastro.com/
Hi Aryan, I am using the ActCAD software which is converting the pdf to dwg for free. You can dowload it. Download here
The conversions are PDF to CAD/.dwg or .dxf which can be done directly by importing in the CAD software. It is normally available in all CAD software. I am using ActCAD and you can also use it for the same conversion process.