It's a real detection. It's an Artemis detection because it's recognised as malware but hasn't been categorised yet.
VirusTotal shows 29 out of 46 companies detect this, and give the alternative names for it. See the report HERE.
If the file has been quarantined can you upload it to McAfee so the labs can have a look at it? Instructions are in www.mcafee.com/us/threat-center/resources/how-to-submit-sample.aspx