PDF malware analysis — malicious · 3123b1bc73136743

MALICIOUS

PDF

11.9 KB

MD5: aa99fadb8f61c850a2fa9090756b6022 SHA-1: cc7fc5bebe481304cc1b7d54c59120c3e24c0b52 SHA-256: 3123b1bc73136743f30d948d635d8d78bde0ebcb91be7b0e253c2ba1af43b654

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1071.001 Web Protocols

The PDF file contains embedded JavaScript, identified as a stager for CVE-2007-5659. This JavaScript is designed to decode and execute further malicious code, likely to download and run a second-stage payload. The presence of multiple JavaScript streams and the specific CVE exploit indicate a sophisticated delivery mechanism. No specific family could be identified, but the technique suggests a downloader or initial access payload.

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` `39f4ba6be838dcd6800908cfcc50e0884eae1b12d9972b095ac11b89edcbdc99`	deobfuscated-js	annotation-subject callee-key decoded JavaScript at offset 0x14A	5235 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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