Delete few hidden links from the home of the wordpress site

I need to delete hidden code from the wordpress website, the home page is hiding spam links,
www.marbellainvestpro.com

https://forbrukernet.com/boligalarm/boligalarm-test.php
https://forbrukernet.com/finans/forbrukslan/lane-penger/
https://forbrukernet.com/finans/kredittkort/kredittkort-test/
https://forbrukernet.com/forsikringer/forsikringsselskaper.php
https://forbrukernet.com/forsikringer/innbo-og-l%C3%B8s%C3%B8re/innboforsikring.php
https://forbrukernet.com/str%C3%B8m/billigste-str%C3%B8mleverand%C3%B8r.php

and a possible malicious iframe link

data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==