Hello nanetto.
How did you find out that your site was spammed?Did your rankings dropped or you received any warnings from Google Search Console?
If it is a rank drop,there is a possibility that it is because of GOOGLE dance and you can wait and watch in that case.
And to answer your question,you can just use majestic SEO tool to download the total backlinks ,look for the spammy links, disavow them from search console and submit for review.
You are pretty much done.
Thank you,