Lets Encrypt is going to be issuing Domain Validation certificates for phishing and malware sites. We’re not sure that certificate issuance is the right level on which to be policing these sites in 2015. CAs are not well positioned to operate anti-phishing and anti-malware operations or to police content more generally. The best CAs can do is check with organizations that have much greater content awareness, such as Microsoft and Google, to identify malicious sites and content.”]
Source: https://letsencrypt.org/2015/10/29/phishing-and-malware.html