PDF malware analysis — malicious · 47af294a8a953f03

MALICIOUS

PDF

12.0 KB

MD5: 0db10d329f62b0a03ca172d345135e21 SHA-1: 00aee0c77648dd6c42f3b593d2ed9ff1bea99bdc SHA-256: 47af294a8a953f03d7c2f3b6a03fbaf6e21804b1b6cdf88e8dee343c947050a6

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.001 Malicious Link/Object T1566.002 Spearphishing Attachment

The PDF contains a critical heuristic firing for CVE-2007-5659, indicating the exploitation of a vulnerability related to the `Collab.collectEmailInfo` JavaScript function. The analysis recovered a significant amount of JavaScript code (5231 bytes) from an annotation subject, which is described as a hex-stager. This stager likely decodes and executes a further payload, which is a common technique for initial access and further infection chains.

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` `d893baba4d0739e9183bd564b91480e68acf5138c4c4824d3afd8251bf8fc466`	deobfuscated-js	annotation-subject callee-key decoded JavaScript at offset 0x14A	5231 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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