PDF malware analysis — malicious · 3c154f6a8e526e95

MALICIOUS

PDF

12.4 KB

MD5: 95746a24666a5b2bb5b880d1abc020a6 SHA-1: 943b7c9b14ed743c147c9ed415f00dd10e452e22 SHA-256: 3c154f6a8e526e95586abbe12a6fe02ece8c927452a4afb2f22c9c029528cba5

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1204.002 Malicious File

The PDF sample contains embedded JavaScript, triggered by the CVE-2007-5659 vulnerability via the 'collab.collectEmailInfo' method. This JavaScript is heavily obfuscated and appears to be a stager for further malicious code execution. The high-confidence heuristic firing for CVE-2007-5659 and the presence of deobfuscated JavaScript strongly indicate a malicious intent to exploit the reader and likely download additional payloads.

Heuristics 5

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)
Annotation subject callee-key hex JavaScript stager high PDF_ANNOT_SUBJECT_CALLEE_HEX_STAGER

PDF JavaScript uses syncAnnotScan()/getAnnots() to read an indirect annotation /Subject stream, percent-decodes it through marker replacement, then uses a callee.toString()-derived key to decode and eval the final exploit stage.
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.
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_obj0007_000.js` `0df291d69669aabea8d48539ff6e3447b14e49a861871000e6476334f075bd19`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A6	1011 bytes
`annotation_subject_callee_hex_stage_000.js` `9c2e5cbe415ddce9ab79a22c8109a553f94e93f6322a346841569f6c77f8c1cd`	deobfuscated-js	annotation-subject callee-key decoded JavaScript at offset 0x14F	5239 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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