PDF malware analysis — malicious · c38d7600f0e413aa

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: 9b69740399f1b6545496bb226594d596 SHA-1: 8844137d68dd4ecdcb7f36695666bb7479d14cfc SHA-256: c38d7600f0e413aaa79c875f3ee34c4693bddf94a27e0ee932d91b22ab599a66

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious Link

The PDF file contains embedded JavaScript that is triggered by the OpenAction. Critical heuristics indicate the use of CVE-2007-5659 (Collab.collectEmailInfo) and eval() calls, suggesting the JavaScript is obfuscated and designed to execute arbitrary code. The presence of 'numeric_charcode_stage_000.js' further supports this, indicating a deobfuscation process. The likely intent is to download and execute a second-stage payload, characteristic of a drive-by download attack.

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` `385a60aff41f46c2a4aabce9e1bc0ab99da50dfe73c205ba68ff6c763ce23d77`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D7	13327 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` `d3c40bae0ff0db4a4d8d7bce2c9fe00be5cc4cb949d0444072a1ba22981bddb3`	deobfuscated-js	numeric char-code string decoded JavaScript at offset 0x445	4044 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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