As you scan your inbox, you notice an important email with a Word document attached—perhaps an invoice, a message from a supplier, or a request from a colleague. Without hesitation, you open it… and just like that, you've fallen victim to a scam.

This is precisely what cybercriminals rely on. Now, they’ve developed a new technique to bypass even the most advanced email security filters—this time, by using corrupted Microsoft Word files.

It's a sophisticated and dangerous tactic.

Phishing (pronounced “fishing”) is a scam in which fraudsters trick you into revealing sensitive information, such as passwords or financial details. They "bait" you with an email that appears legitimate, often imitating your bank, a coworker, or a trusted company.

These emails frequently contain attachments or links. Opening the attachment or clicking the link could result in downloading malicious software (malware) or being directed to a fraudulent website designed to steal your information.

Phishing attacks are continuously evolving and have become one of the most common methods used to infiltrate businesses. While email security filters are typically effective at scanning attachments, corrupted files evade detection because they cannot be properly analyzed. As a result, these Word files slip into inboxes undetected.

When you open one of these corrupted files, Microsoft Word will attempt to “repair” it, displaying what appears to be a normal document. However, the file may contain a malicious QR code or link that redirects you to a phishing site—often a fake Microsoft 365 login page. Entering your credentials could grant scammers access to your account—and potentially your entire business.

It only takes one compromised employee login for cybercriminals to wreak havoc. With access to your cloud systems, they could steal sensitive customer data, lock your team out of critical files, or use your account to send phishing emails that target your contacts.

The consequences could be devastating. Your business may suffer financial losses, legal repercussions, and reputational damage that could take years to repair.

Cyber threats are becoming increasingly sophisticated, but you don’t need to be a cybersecurity expert to protect your business.

Awareness and caution are your best defenses.

Here’s how you can stay safe:

  • Pause and think before opening attachments or clicking on links.
  • Be cautious of urgent emails—scammers often create a sense of urgency to prompt quick, thoughtless actions.
  • If an email seems suspicious, verify its legitimacy by contacting the sender directly.
  • Don’t trust an attachment or link just because it appears professional.
  • Most importantly, educate yourself and your team on phishing threats, their dangers, and how to identify warning signs.

We assist businesses like yours in navigating these risks every day. If you need support, reach out to us.

Cybercriminals are using corrupted Microsoft Word attachments to bypass email security filters and launch phishing attacks. Learn how these scams work and the steps you can take to protect your business from potential data breaches.