PDF malware analysis — malicious · 7fb1eecd808ed629

MALICIOUS

PDF

11.8 KB

MD5: de6a45149e60b49e1b157b2ba9be0a07 SHA-1: c8d8198dca6a3b0e6f715d40c78e0347a0be7e5c SHA-256: 7fb1eecd808ed6293fa2f4ed29b0188f061809028cd806fa196817ca736de797

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript, identified as a stager exploiting CVE-2007-5659. The heuristic 'CVE_2007_5659: Collab.collectEmailInfo' indicates the use of a known vulnerability to execute the JavaScript. The deobfuscated JavaScript, 'annotation_subject_callee_hex_stage_000.js', is likely responsible for downloading and executing a secondary payload, a common technique for initial access.

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)
ClamAV: Pdf.Exploit.Agent-36181 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36181
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` `a246c68d5544a5fc390ae92571a910dee0516c54ba546b2460fd1ca6ec360799`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A6	604 bytes
`annotation_subject_callee_hex_stage_000.js` `cf8696b0af0e999a4041c085bddea4de3e9a59ca1143af6492c37a7117324d11`	deobfuscated-js	annotation-subject callee-key decoded JavaScript at offset 0x14F	5223 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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