PDFs are one of the most common file types shared online — invoices, contracts, brochures, or even government forms.
Unfortunately, they’re also one of the most abused file formats for spreading malware and phishing attacks.

Cybercriminals know that people trust PDFs, so they hide malicious code or dangerous links inside them.
The good news? You can protect yourself with a few easy steps.

1. Always Check the Source

Before opening any PDF, ask yourself:

Was this file expected?
Do I know and trust the sender?
Does the file name make sense?

If you didn’t expect it — or it came from an unknown contact — don’t open it.
Attackers often disguise harmful files with names like invoice_2025.pdf or delivery_receipt.pdf.

When in doubt, verify with the sender through another channel (like a phone call or a direct email).

2. Be Careful with PDFs That Ask for Permissions

Some malicious PDFs try to convince you to: - Enable JavaScript
- Run macros
- Download “fonts” or external content

That’s a major red flag 🚩.
Legitimate PDFs don’t need extra permissions to display properly.

3. Never Open PDFs Inside Your Email Client

Previewing a PDF directly from your inbox can trigger background scripts or exploit reader vulnerabilities.
Instead, download it and scan it using a trusted antivirus or an online analyzer like SeguraDoc.

4. Use SeguraDoc to Analyze and Sanitize PDFs Safely

Even if a PDF looks harmless, it may contain hidden elements such as: - Embedded executables - Obfuscated links or QR codes - Encrypted attachments

SeguraDoc processes every PDF in an isolated environment — completely separate from your device.
It analyzes, sanitizes, and gives you a clean, secure version that you can safely open.

You’ll see the content, not the risk.

5. Check for Hidden Links or QR Codes

Attackers often insert malicious URLs behind text or QR codes.
SeguraDoc automatically extracts and verifies these links to ensure they don’t lead to phishing or malware sites.

You can inspect each link before visiting — giving you complete control over your security.

Final Thoughts

PDFs are part of daily life, but that doesn’t mean they’re always safe.
To stay protected:

Open only files from trusted sources.
Never enable extra permissions or scripts.
Use SeguraDoc for instant PDF scanning and sanitization.

Stay secure, protect your data, and let SeguraDoc handle the risks for you.

🔒 About SeguraDoc

SeguraDoc helps you open and review PDF files safely without exposing your system to potential threats.
Our sandboxed analysis engine removes malicious code, detects phishing attempts, and sanitizes every file you upload.

Your privacy matters — every file is deleted automatically after 24 hours.

👉 Try SeguraDoc today and experience safe PDF viewing online.