Similar to discussed in other posts about malicious iframes in websites, this malware is obfuscated and in addition uses cookie bomb technique to evade Anti-Viruses and other detection mechanisms.
Public databases of site scan reports for:
Potentially Suspicious domains
For global web malware monitoring statistic and severity levels:
Malicious iframes are often used to distribute malware hosted on external web resources(websites).
Decoded payload generates hidden iframe to hxxp://mangol.co.uk
Blacklisting statusThe URL is detected by 3/51 Anti-Virus engines in VirusTotal and noted as being infecting several domains through software vulnerability exploits.
Malware clean-upBeing blacklisted, usually, means your website was compromised and detected actively distributed malware or acting as an intermediate in malicious chain. If you suspect that your website was infected, use Website Anti-malware Monitoring for malware removal.
Alternatively, you can try to remove malware using Quttera's website scan report. You will then need to submit your website(s) for re-testing and removing from blacklist.