PDF malware analysis — malicious · 55f6f0d15dfa6f00

MALICIOUS

PDF

11.9 KB

MD5: 1b058c38bb9b5e36a2ec2c102b92eaf5 SHA-1: 3aeb082716a3d85428fa3f81e2bf23cbfaf0aa2d SHA-256: 55f6f0d15dfa6f0094dcfa0710df9bb04ce8229f1a440787439c32e5d5bb51b2

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.001 Malicious Link/URL

The PDF file contains embedded JavaScript, identified as a stager for CVE-2007-5659. This stager is designed to decode a hex-encoded payload and execute it. The primary technique observed is the use of JavaScript to achieve arbitrary code execution within the context of the PDF viewer. The deobfuscated JavaScript file 'annotation_subject_callee_hex_stage_000.js' is the main artifact responsible for this malicious behavior.

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` `83c89bafa116d9c91eff0b9ebda502f5bf0baa04c36fa774c6ebc2756ba3479f`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A6	585 bytes
`annotation_subject_callee_hex_stage_000.js` `15ff7b1aeff2f5299d189b4909604b55ccf4b3cac669aa7aef34f5149c81c6bb`	deobfuscated-js	annotation-subject callee-key decoded JavaScript at offset 0x14F	5195 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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