PDF malware analysis — malicious · 9d0830c91981473c

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: 0a4ea5449abcc6f70ef715c759a05582 SHA-1: 456ceb2a4752bc390a913ced796df70294e27aa2 SHA-256: 9d0830c91981473cdc95c64c30231e1ac2673260b2094d6752c973167dbe55e1

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File T1566.002 Spearphishing Attachment

The PDF file contains embedded JavaScript triggered by an OpenAction, indicating an attempt to execute code upon opening. The critical CVE-2007-5659 heuristic firing, specifically mentioning Collab.collectEmailInfo and a numeric character-code string decoded JavaScript, strongly suggests exploitation of this known vulnerability. The embedded JavaScript streams, including one identified as 'deobfuscated-js', are likely responsible for the malicious payload delivery. The file's structure and heuristics point towards a malicious PDF designed to exploit viewer vulnerabilities.

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` `5c4ecec48dfdb06f9a1733cf5c7d7e7f32d28e307db2d4ae5f429ab805a3e196`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D2	10849 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` `7022b44c0cdc27f504a486f0783751c511414a71de9f33dd93ae3fe8e1a09b22`	deobfuscated-js	numeric char-code string decoded JavaScript at offset 0x42D	3273 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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