Inbound links to internal search with pharma spam anchor text. Negative seo attack

[Arlinaite47]

Suddenly in October I had a spike on inbound links from forums and spams sites. Each one had setup hundreds of links. The links goes to WordPress internal search.

Example:

mysite.com/es/?s=⚄

[Arlinaite47]

Sorry,

The message was cut off

Suddenly in October I had a spike on inbound links from forums and spams sites. Each one had setup hundreds of links.

The links goes to WordPress internal search.

Example:

mysite.com/es/?s=here a very long text related to a pharma search

No humans are visiting those links but I have dozens of bots digging in those links and looking for invalid traffic.

I disavow the links, but looks that I am David fighting against Goliat with a toothpick

How to stop this?