PDF malware analysis — malicious · 588e4c71eebafca5

MALICIOUS

PDF

3.5 KB Created: 2008-31-20 53:85:00 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: d8a466030f25e25a7c078ba156c2f660 SHA-1: 3af15a1fcd4b91d89c3000d36725f7afd0327bcb SHA-256: 588e4c71eebafca5c7cdf5ca0bfc1fd66bba4ab2a3203f1c64f755052f3847be

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File T1071.001 Web Protocols

The PDF file contains embedded JavaScript triggered by an OpenAction, a common technique for exploiting PDF vulnerabilities. The critical CVE-2007-5659 heuristic indicates the use of `Collab.collectEmailInfo` and `eval()` with a string constructed from character codes, which is a known method for obfuscating malicious JavaScript. This script is likely designed to download and execute a secondary payload. No specific family could be identified.

Heuristics 7

Collab.collectEmailInfo — CVE-2007-5659 critical CVE exact CVE_2007_5659

PDF JavaScript calls Collab.collectEmailInfo — CVE-2007-5659 is a buffer overflow in Adobe Reader triggered by a long argument or heap-sprayed message field passed to Collab.collectEmailInfo(). Part of a series of Acrobat JS API exploits. (identified after JavaScript deobfuscation)
OpenAction trigger high PDF_OPENACTION

PDF has an /OpenAction — code runs automatically when opened
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_001.js` `2a1806d09db5417d4d0772fd59cec22cd37fdb3ac5b33bd5f56b891a51295c45`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D7	13251 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`numeric_charcode_stage_000.js` `a0026714314c359986fe933555b7adb3ed62ca3f20fff52bf616a182b728b930`	deobfuscated-js	numeric char-code string decoded JavaScript at offset 0x445	4020 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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