PDF malware analysis — malicious · f175dea479515022

MALICIOUS

PDF

11.7 KB

MD5: 7b569402cd0225ae71cb0bbf6b205b64 SHA-1: b84cbe2a14f57e2b30b62667c5131ccf063e86c9 SHA-256: f175dea479515022029954cc53c9301eb8d6f843ecaad7c1fb55254725a5104b

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, triggered by the annotation subject. This JavaScript acts as a stager, decoding and executing further obfuscated JavaScript. The critical heuristic 'CVE_2007_5659: Collab.collectEmailInfo' indicates the exploitation of a known vulnerability in Adobe products to achieve arbitrary code execution. The primary intent appears to be the execution of a second-stage payload via the decoded JavaScript.

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` `e53cd3b2abe44a0ffe069bd2e56f48e1b1e8932489ba93331de44d133ee7058e`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19C	582 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`annotation_subject_callee_hex_stage_000.js` `0f133f49ab2fa9e42bb4bc929d48a59fcc926aa78f6ac171a7bc16d60fb1a87a`	deobfuscated-js	annotation-subject callee-key decoded JavaScript at offset 0x14A	5067 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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