UPSInvoice.EXE virus has not been picked by AVAST

Please let me know if anybody esle had this problem.
One of my clients got this spam email from tracking@ups.com:

Hello!

Sorry, we were not able to deliver postal package you sent on December
the 25th in time
because the recipient’s address is not correct.

Please print out the invoice copy attached and collect the package at
our office.

Your UPS Support Team
there was a file attachment UPSInvoice.zip with only one file UPSInvoice.EXE
The Avast has scanned this email according to the AVAST text file attached (see below) but the zip file still was not clean

avast! Antivirus: Outbound message clean.
Virus Database (VPS): 090106-1, 01/06/2009
Tested on: 1/6/2009 4:39:07 PM
avast! - copyright (c) 1988-2009 ALWIL Software.
http://www.avast.com

If you have a sample, send the sample to virus@avast.com zipped and password protected with the password in email body, a link to this topic might help and undetected malware in the subject.

Or you can also add the file to the User Files (File, Add) section of the avast chest (if it isn’t already there) where it can do no harm and send it from there. A copy of the file/s will remain in the original location, so you will need to take further action and can remove/rename that.

Send it from the User Files section of the chest (select the file, right click, email to Alwil Software). It will be uploaded (not actually emailed) to avast when the next avast auto (or manual) update is done.