Dictionaries, collections of objects indexed by names.

Boolean values, representing true or false.

The general structure of a PDF file is composed of the following code components: In most cases, the embedded scripts are responsible for dropper functionality, or else there is a need to install an OS-based malware on the victim’s system. JavaScript is the most popular for this purpose. The scripts that are responsible for malicious behavior can be written in a scripting language that PDF supports. Normally, the PDF malware’s malicious behavior is in a script that is embedded In PDF files. In previous years, cybercriminals embedded malicious script to install malware and steal user credentials. The dynamic PDF capabilities mentioned above can and have been used to house malicious content.

While we have all benefited from this feature-rich information-sharing venue, there exists a darker side. Combined, these elements can deliver a visually appealing, interactive, and portable document. The PDF has ability to deliver rich contents (static and dynamic). Here is the information you’ll need to know. It’s good to know how to analyze PDF files, but analysts first need a basic understanding of a PDF before they deem it malicious. Malicious PDF files are frequently used as part of targeted and mass-scale computer attacks for these reasons.

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. 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. Previous years were not good for PDF users, as several vulnerabilities were published, such as buffer overflow vulnerability in versions prior to version 9. The PDF format is used in almost all companies to share business deals, company brochures, and even invitations. It’s hard to imagine business proposals without PDFs. PDF files have become very common in everyday work.

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