no its not, those sites distribute uploaded files to antivirus companies which kinda defeats the purpose if you are trying to get a trojan/backdoor undetected


@ Stumickel
that is nothing to worry about, that definition is also known as riskware and its just a generic term for low risk items like hacktools cracks and patches that would not be found on the average machine in a corporate environment for example.
if you are using installing a cracked application it will be flagged as a potentially dangerous item for this reason but should be safe enough.