How A Simple PDF File Can Put Your Computer At Hacking Risk

If

you use Adobe Reader on your laptop or PC, even opening a simple PDF file can put your device at risk. According to a report, hackers are using a serious bug (called a zero-day flaw) to target users through PDF files.Spotted by BleepingComputer, the bug was flagged by security researcher Haifei Li, who said hackers are using a highly advanced technique to target an unknown vulnerability in Adobe Reader. What makes this attack more concerning is that it does not require any action beyond opening the file. In simple terms, just clicking on a malicious PDF could be enough for hackers to gain access.

According to Li, these attacks have been targeting Adobe users for at least 4 months, stealing data from compromised systems using privileged 'util.readFileIntoStream' and 'RSS.addFeed Acrobat APIs', and deploying additional exploits.READ: How Hackers Breached Supercomputer In China To Steal Fighter Jet And War Simulation Data

The cybersecurity researcher also said that this attack is designed to quietly collect sensitive data from infected systems. According to the report, the bug uses built-in Adobe tools to read local files and extract information without alerting the user. In some cases, it can also open the door for further attacks, potentially allowing hackers to take full control of a device.Another researcher, known as Gi7w0rm, found that many of these malicious PDFs are being circulated with Russian-language content, often linked to topics around the oil and gas industry. This suggests that the attacks may be part of targeted phishing campaigns but anyone could become a victim. With no patch available yet, this is one threat where awareness is the only real defence.READ: Google AI Bug Hits Popular Apps, Leaving Millions Of Users At Risk

"This zero-day/unpatched capability for broad information harvesting and the potential for subsequent RCE/SBX exploitation is enough for the security community to remain on high alert. This is why we have chosen to publish these findings immediately so users can stay vigilant," Li said.The report also mentioned that Li already notified Adobe about these findings and until the company releases security updates to address this actively exploited vulnerability, Adobe Reader users should not to open PDF documents received from untrusted contacts.