There are numerous services that keep track of websites loaded with malware.
VirusTotal site at www.virustotal.com/gui/home will check URLs (i.e. Internet addresses) for you.
Option 1 is to upload a file and have it checked for malware
Option 2 is to type in a URL to be checked.
Then VirusTotal checks against more than 70 blacklists created by the anti-malware companies.
Virus Total Community
The VirusTotal Community is a network of interested parties that allows them to comment on files and URLs and share notes with each other. This can be useful in detecting malicious content and also in identifying false positives which are the harmless items sometimes detected as malicious by one or more scanners.
If you find a suspicious web site or receive a suspicious document of any kind then try the virustotal checker.
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