PDF malware analysis — malicious · 3bbaae132bd0df64

MALICIOUS

PDF

17.3 KB

MD5: d9b450a7efad7283c741ec1bf380ed72 SHA-1: 05f4c614190edd93550d11d9a2de14fcb1d54086 SHA-256: 3bbaae132bd0df64e2b39633bc1d729f07f6afad5d8a88b69632cfd6ddce0e9e

126 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.001 Malicious Link/Document T1071.001 Web Protocols

The PDF file contains embedded JavaScript, identified as a stager for CVE-2007-5659. This script is designed to exploit a vulnerability in PDF viewers, likely to download and execute a secondary payload. The presence of multiple deobfuscated JavaScript files indicates a complex execution chain. The primary attack vector is the exploitation of the CVE-2007-5659 vulnerability.

Heuristics 6

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.
syncAnnotScan annotation-staging primitive low PDF_FOXIT_SYNCANNOTSCAN

PDF JavaScript calls syncAnnotScan() — a no-op annotation-enumeration primitive used by exploit-kit JavaScript to stage payload reads from annotation /Subject fields before eval(). Not a vulnerable sink itself; rarely seen in legitimate PDFs. (matched in decompressed 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0009_000.js` `9e0052f1da949c6d96e0a127bc9be1c956af002131b8cbc37872d723839f26f9`	pdf-javascript-stream	PDF /JS object 9 at offset 0x42E9	440 bytes
`annotation_subject_callee_hex_stage_000.js` `1a554ed02bb93ed8fe1b4a9571a96b5c48d9c89d3d8ba5f283d90cc5e4fa502f`	deobfuscated-js	annotation-subject callee-key decoded JavaScript at offset 0x1B2D	5438 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `d98d12992b308f21ad5c4d044b619709f04b662bcd701ece8621f5f8230ad7ef`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x1B81	12121 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`deobfuscated.js` `876cf6649e314ba06b415e0606ae4da0165e30efb02d53d00416b17e91ac687a`	deobfuscated-js	PDF JavaScript deobfuscation pass	103569 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 long base64-like blob(s).

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