Website infected with URL: mal

Dear all,

HOpe you are doing well ??

I have 2 websites in my company which are infected with an URL:MAL

No error shows up on the website but when I visit with the free version of avast, adblock pops up with this error:

“We cancel the connexion to tags.stickloader.info because this element was infected by URL:Mal”

Websites are:
serre-acd.ch
and
numeractive.ch

Do you have any idea from where this comes from ?
I am using wordpress with latest version

Thanks a lot,
Florian

The page I need help with: [log in to see the link]