PDF malware analysis — malicious · a1eeb24526f22521

MALICIOUS

PDF

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

MD5: d711e97abd1db11c1ce0da56bac5ade9 SHA-1: 7f70f7212ebfff28c84fab0c218ed8c707e3b4e0 SHA-256: a1eeb24526f2252189fa20e7af65e758691f66cbac868c20be3a904b1d40d5e6

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/Shell Script Execution T1204.001 Malicious Link/URL T1071.001 Web Protocols

The PDF file contains embedded JavaScript that is triggered by the OpenAction dictionary. The critical CVE-2007-5659 heuristic indicates that the JavaScript uses a numeric character-code string decoded JavaScript and the eval() function to execute arbitrary code. This is likely intended to download and execute a second-stage payload. The file was authored using Scribus, which is not inherently suspicious, but the exploit vector is clear.

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` `69295cc7caa5171bafa76dae13718c3b157b15790573c29ae61a6591927f8e67`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D7	13859 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` `59fbb001f6faf1b96c1799a1a1e877c334bb2b159c2307bc9c963fe8275d0a64`	deobfuscated-js	numeric char-code string decoded JavaScript at offset 0x445	4212 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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