There is no way in Google Webmaster to find the bad links, just you need experience means time to time you will understand what is bad links and what things you should avoid to go that side
Useful links !!
Hope this will help you
I just downloaded the latest external links from Search Console and know I am manually checking all the links. Is it bad link our spam link , So know while discovering that “Bad links our Spamming links” what Point should I cover while finding the links, some point which i know Like.1. Page Authority.2. Domain Authority.3. Spam score.4. Irrelevant.Anything else if I am missing please let me know @Siraj_Mahmood