PDF malware analysis — malicious · 94c4e2fe13568270

MALICIOUS

PDF

12.6 KB

MD5: dbd4e64bdd6bcee817c0ba2f0481e3ec SHA-1: 9e70397591aa633dc7dbd5d76b81f0c851ff14f5 SHA-256: 94c4e2fe13568270566369ec04504410d68b17d814a1060834a11ee6bcd80949

120 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

The PDF sample contains embedded JavaScript, identified by the PDF_JAVASCRIPT and PDF_JS heuristics. A critical heuristic, CVE_2007_5659, indicates the exploitation of a known vulnerability (Collab.collectEmailInfo) to execute a hex-decoded JavaScript stager. This stager is responsible for downloading and executing a second-stage payload. The obfuscated nature of the script and the use of a known exploit suggest a malicious intent to compromise the user's system.

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` `e0cfd4a6f43e3525e74a981645a3105b23d040ad15f947bd320c5f9e7009c553`	deobfuscated-js	annotation-subject callee-key decoded JavaScript at offset 0x14F	5244 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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