PDF malware analysis — malicious · ee8605bfda2e691a

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: bf779b4ad6c865d35425f044f2f2d179 SHA-1: 374030019804a4b1e4587dcc12b34de7d6b52cfe SHA-256: ee8605bfda2e691a5585b40d7002fcf711011c04aef23a4ad7979eb26bb44aa8

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/Shell T1559.001 Component Object Model T1204.002 Malicious File

The PDF file contains embedded JavaScript triggered by the OpenAction, which is a common technique for exploiting PDF vulnerabilities. The critical heuristic firing for CVE-2007-5659 indicates the use of a specific exploit targeting the Collab.collectEmailInfo method. The JavaScript is obfuscated using fromCharCode and eval, suggesting it's designed to download and execute a second-stage payload. The file's structure and heuristics strongly indicate a malicious intent, likely to compromise the user's system.

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` `aa535949812ecc18fc1d7efb55876b5b4599bb988434bc9c642d5cb3eb5a8274`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D7	14075 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` `da80f68309498f4c8ccc78307c70f1a7fd493ce80b3228f477d7f1d13aa6b2d0`	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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