Malware spam from "Voicemail Service" [pbx@local]

This fake voicemail leads to malware:

Subject:       [PBX]: New message 46 in mailbox 461 from "460GOFEDEX" <8476446077>
From:       "Voicemail Service" [pbx@local]
Date:       Tue, August 22, 2017 10:37 am
To:       "Evelyn Medina"
Priority:       Normal

Dear user:

        just wanted to let you know you were just left a 0:53 long message (number 46)
in mailbox 461 from "460GOFEDEX" <8476446077>, on Tue, 22 Aug 2017 17:37:58 +0800
so you might want to check it when you get a chance.  Thanks!

                                --Voicemail Service

The numbers and details vary from message to message, however the format is always the same. Attached is a RAR file with a name similar to msg0631.rar which contains a malicious script named msg6355.js that looks like this [pastebin]. The script has a VirusTotal detection rate of 14/59.

According to automated analysis [1] [2] the script reaches out to the following URLs:

5.196.99.239/imageload.cgi [5.196.99.239 - OVH, Ireland / Just Hosting, Russia. Hostname: noproblem.one]
garage-fiat.be/jbfr387??qycOuKnvn=qycOuKnvn [91.234.195.48 - Ligne Web Services, France]

A ransomware component is dropped (probably Locky) with a detection rate of 16/64.