I recently downloaded a PDF file using Firefox, and it opened automatically after the download. Now I'm worried it might be malware. I quickly deleted it and ran a Windows scan, which found nothing. However, when I checked it on VirusTotal, I got some sketchy results. I then decided to do a factory reset on my PC. I'm unsure whether the operating system reinstalled from an internet source or local files since I turned off internet access. Could the malware still be lurking on my PC? I also transferred some important files to my D, E, F, and G drives; could they potentially be infected too? Any advice would be appreciated!
2 Answers
What specifically made you think the PDF was harmful when it opened? Usually, PDFs just link to sites where scams happen. If you deleted it quickly, you may have dodged anything serious. A factory reset should clear out any potential harm, even if it was from local files. If you're still worried, you could download a fresh OS onto a USB drive and reinstall it for peace of mind.
You mentioned it opened automatically after download—what does that mean? Normally, PDFs can't run code on their own unless you're using an outdated viewer. You also called it a "Firefox PDF"—can you clarify where it came from? That might help figure out if there's real danger.
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