peepdf
peepdf is a Python tool to explore PDF files in order to find out if the file can be harmful or not. The aim of this tool is to provide all the necessary components that a security researcher could need in a PDF analysis without using 3 or 4 tools to make all the tasks. With peepdf it's possible to see all the objects in the document showing the suspicious elements, supports all the most used filters and encodings, it can parse different versions of a file, object streams and encrypted files. With the installation of PyV8 and Pylibemu it provides Javascript and shellcode analysis wrappers too. Apart of this it's able to create new PDF files and to modify/obfuscate existent ones.
The main functionalities of peepdf are the following:
Analysis:
Decodings: hexadecimal, octal, name objects
More used filters
References in objects and where an object is referenced
Strings search (including streams)
Physical structure (offsets)
Logical tree structure
Metadata
Modifications between versions (changelog)
Compressed objects (object streams)
Analysis and modification of Javascript (Spidermonkey): unescape, replace, join
Shellcode analysis (Libemu python wrapper, pylibemu)
Variables (set command)
Extraction of old versions of the document
Easy extraction of objects, Javascript code, shellcodes (>, >>, $>, $>>)
Checking hashes on VirusTotal
Creation/Modification:
Basic PDF creation
Creation of PDF with Javascript executed wen the document is opened
Creation of object streams to compress objects
Embedded PDFs
Strings and names obfuscation
Malformed PDF output: without endobj, garbage in the header, bad header...
Filters modification
Objects modification
Execution modes:
Simple command line execution
Powerful interactive console (colorized or not)
Batch mode
TODO:
Embedded PDFs analysis
Improving automatic Javascript analysis
GUI