Invoice 951266 – Fake PDF Malware

spotting malware

Invoice 951266 pretending to be from Sue Mockridge [] is another one from the current zbot runs which try to drop cryptolocker, ransomware and loads of other malware on your computer. They are using email addresses and subjects that will entice a user to read the email and open the attachment.

A very high proportion are being targeted at small and medium size businesses, with the hope of getting a better response than they do from consumers. This is a continuation of the campaign shown in Santander Bank March Invoice – fake word doc malware and Order Confirmation – – fake PDF malware where they take a genuine company email address and spoof it and pretend the emails come from that company

25 April 2021 they have updated this campaign today, but instead of a small upatre downloader in the attachment, there is the full blown gameover Zbot

Almost all of these have a password stealing component, with the aim of stealing your email or FTP ( web space) log in credentials. Many of them are also designed to specifically steal your facebook and other social network log in details.

Please read our How to protect yourselves page for simple, sensible advice on how to avoid being infected by this sort of socially engineered malware.

Email looks like this:


Please can you let me have a payment date for the attached March Invoice?

Kind Regards

Sue Mockridge

Accounts Administrator

‘ (Main) 01884 242626  ’ (Direct Dial) 01884 250764

Please consider the environment before printing

Broad Oak Toiletries Ltd, Tiverton, Tiverton Way, Tiverton Business Park, Tiverton, Devon, EX16 6TG

Registered No. 1971053 England & Wales

Telephone: +44 (0) 1884 242626

Facsimile: +44 (0) 1884 242602


The information in this email and any attachments is confidential. It is intended solely for the attention and use of the named addressee(s). The unauthorised copying, retransmission, dissemination and other use of, or taking of any action in reliance upon, this information is prohibited. Unless explicitly stated otherwise, the contents of this message are strictly subject to contract; any views expressed may be personal and shall not create a binding legal contract or other commitment on the part of Broad Oak Toiletries Ltd.


This email has been scanned by the Symantec Email service.

For more information please visit

23 April 2021: Invoice 288910 March 2021 ( 10 kb) Extracts to Invoice 288910 March 2021.exe Current Virus total detections: 2/50

25 April 2021: March invoice {DIGIT5}.zip ( 462 kb) Extracts to March invoice 627710.exe Current Virus total detections: 11/51

2nd version on 25 April 2021: March-821777 ( 364 kb) Extracts to March invoice 627710.exe Current Virus total detections: 14/50

This Invoice 951266 is another one of the spoofed icon files that unless you have “show known file extensions enabled“, will look like a proper PDF file instead of the .exe file it really is, so making it much more likely for you to accidentally open it and be infected.

All of these emails use Social engineering tricks to persuade you to open the attachments that come with the email. Whether it is a message saying “look at this picture of me I took last night” and it appears to come from a friend or is more targeted at somebody who regularly is likely to receive PDF attachments or Word .doc attachments or any other common file that you use every day. Be very careful when unzipping them and make sure you have “show known file extensions enabled“, And then look carefully at the unzipped file. If it says .EXE then it is a problem and should not be run or opened.

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