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We also use third-party cookies that help us analyze and understand how you use this website. Being the most common email attachment, PDF is commonly targeted to breach computer networks.
PDF is a powerful document which contains static elements images and text , dynamic elements forms and embedded signatures. These elements are necessary to make document visually appealing and consistent, there is a darker side to it. Above mentioned capabilities have been misused to inject malicious scripts. Javascript — Javascripts are used in the website coding to control browser appearance and functionality. In past, it has been used to exploit multiple vulnerabilities in Adobe as well as many other PDF readers.
Most of the commands have now been disabled by Adobe but they might be open in other readers or earlier versions. A lot of the attacks were observed trying to abuse the bug by using social engineering or by hosting malicious PDF files on the Internet. Just the simple act of opening the PDF file could exploit a vulnerability to automatically download malicious code from the internet, and display a decoy PDF file to trick you into believing that nothing wrong has happened.
Malicious PDF files are frequently used as part of targeted and mass-scale computer attacks for these reasons. The PDF has ability to deliver rich contents static and dynamic. Combined, these elements can deliver a visually appealing, interactive, and portable document. While we have all benefited from this feature-rich information-sharing venue, there exists a darker side. The dynamic PDF capabilities mentioned above can and have been used to house malicious content.
In previous years, cybercriminals embedded malicious script to install malware and steal user credentials. The scripts that are responsible for malicious behavior can be written in a scripting language that PDF supports. JavaScript is the most popular for this purpose. A launch action launches an application or opens or prints a document. When we open any malicious PDF file, it will execute the JavaScript and it exploits the JavaScript; after that, the shell code is processed and a Trojan will be executed from the Internet.
Adobe Reader is prone to a stack-based buffer-overflow vulnerability. We can see that our PDF file was created. You can access this PDF by using the given path. Before we send the malicious file to our victim, we need to set up a listener to capture this reverse connection. Analyzing a PDF file involves examining, decoding, and extracting the contents of suspicious PDF objects that may be used to exploit a vulnerability in Adobe Reader and execute a malicious payload.
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