I'm seeing on my webmasters tool some new ,very crappy/spammy links to one of my sites ( chinese/japanese unrelated sites, one pager sites with links to every page of mine and etc.). The numbers are not thousands but some tens to hundreds. Not 100% sure but I suspect a negative SEO act. There is no option to contact any webmaster on these sites.
Also, there is a significant drop in rankings in the past few days, can't tell if it's the Panda update or the effect of these links.
I never thought I will need to use the disavow tool, but I'm very much considering it right now.
Anyone with a similar experience could advise?
Appreciate the help.