It isn't from British Gas, of course. Or from Topsource.
From: trinity <email@example.com>
Subject: British Gas - A/c No. 602131633 - New Account
Please refer to the attached invoice from British Gas, the account number on it is different
from all the account numbers that we currently have in the system. Can you confirm if this is a
new account so that we will create this in system.
Thanks & Regards,
Trinity Restaurants Accounts Team | TopSource Global Solutions | 020 3002 6203
4th Floor | Marlborough House | 10 Earlham Street | London WC2H 9LN | www.topsource.co.uk
And why would a British Gas invoice come from Trinity Restaurants Accounts Team?
Jotti - 3 out of 21 flagged it; Ikarus, Kaspersky and Quick Heal.
Metascan - 2 out of 43; Baidu and Kaspersky
Virustotal - 3 out of 54; Fortinet, GData and Ikarus
Virustotal first saw it 2 hours ago. And that's why antivirus products don't flag the files that are sent via email.