In addition to the fact that site visitors can be infected by computer viruses, the website itself can be removed from search engine results. Modern search engine has a capability to look for such malicious urls inside HTML pages. If malware url is found by search engine, it can block access to the legitimate website.
If a malware url is found in your website, you should clear all the pages reported. Make sure that this malware urls does not appear in other pages and not only in reported ones.
ZeroDayScan collects these malware urls from a number of resources. For example from Zeus tracker project https://zeustracker.abuse.ch/
How the website get infected with a virus/malware url ?
Fraudsters are using automated tools to infect websites with malware urls. There are 3 types of tools that we are aware. It is possible that there are some more variants.
Automatic form submitters
Fraudsters are using automated tools to post links as a comment spam. These are the same tools used by the black hat seo people to spam links across thousands of websites. These tools can be very smart. Some of them are able to break capthas in automatic way. There are some ways to combat with these tools. Some online services exist that analyze comments submitted by users and block spam submissions.
Automatic Ftp Exploiter
Automatic SQL Injector
These tools look for SQL injections inside website and automatically change data to include malicious urls. So if a website script shows data from a table that has malware url added to every record, these urls are displayed to the site visitor. As a result, user’s computer is under attack by computer virus loaded from the malware url. Very known example of such activity is Asprox virus. This virus exploited sites that store data in Microsoft SQL Server. To protect from such attacks it is recommended to install database firewall like greensql database firewall.