something like this will add a great regularly updated malware file for it to use. More security and privacy to you! Specifically, this uses https://github.com/StevenBlack/hosts Choose one of the Raw Hosts file from there to use.
To setup DNSMasq, follow the below ...
wget -O- https://raw.githubusercontent.com/StevenBlack/hosts/master/hosts | awk '$1 == "0.0.0.0" { print "address=/"$2"/0.0.0.0/"}' > /etc/dnsmasq.d/malware.conf`