MALICIOUS
256
Risk Score
Malware Insights
MITRE ATT&CK
T1059.001 PowerShell
T1204.001 Malicious Link
The PDF file contains embedded JavaScript that is obfuscated and appears to be a stager. The critical heuristic 'CVE_2007_5659: Collab.collectEmailInfo' indicates exploitation of a known vulnerability in Adobe Reader. The extracted JavaScript streams, particularly 'annotation_subject_callee_hex_stage_000.js', are likely responsible for decoding and executing a secondary payload, potentially leading to further system compromise.
Heuristics 7
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Collab.collectEmailInfo — CVE-2007-5659 critical CVE exact CVE_2007_5659PDF 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)
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U3D/3D content in PDF — Adobe Reader 3D parser CVE-family indicator high PDF_U3D_CVE_RELATEDPDF contains U3D (Universal 3D) or 3D annotation content — CVE-2011-2462 and CVE-2009-3953 are critical vulnerabilities in Adobe Reader's U3D processing that allow arbitrary code execution. U3D content in PDFs is extremely rare in normal documents.
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ClamAV: Pdf.Exploit.Agent-36165 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Exploit.Agent-36165
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Annotation subject callee-key hex JavaScript stager high PDF_ANNOT_SUBJECT_CALLEE_HEX_STAGERPDF 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.
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Suspicious extracted artifact high EXTRACTED_FILE_STATIC_TRIAGEOne 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.
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JavaScript action low PDF_JAVASCRIPTPDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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Embedded JS stream low PDF_JSPDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
javascript_obj0007_000.js3f254d15363cfc46f758dc79a2cb1074c4072b68aa3f4c80a9bf6696d85176e0 |
pdf-javascript-stream | PDF /JS object 7 at offset 0x1AD | 1045 bytes |
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Detection
ClamAV:
No threats found
Obfuscation or payload:
likely
Carved artifact contains 1 eval/decoder/string-building token(s).
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annotation_subject_callee_hex_stage_000.js570612baff5e90f78c13d3a805878ae2fdaa9702c5800bf0a9b379b2b8caac37 |
deobfuscated-js | annotation-subject callee-key decoded JavaScript at offset 0x156 | 5634 bytes |
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Detection
ClamAV:
No threats found
Obfuscation or payload:
likely
Carved artifact contains 5 eval/decoder/string-building token(s).
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u3d_00_off00003318.bin0de4003a900e42a2dfc771b68a31232346c9f4f3771c57dc8bb04f4762da15d6 |
pdf-3d-stream | PDF U3D 3D stream at offset 0x3318 | 27387 bytes |
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Detection
ClamAV:
No threats found
Obfuscation or payload:
likely
Carved artifact entropy is 7.99, consistent with packed or encrypted content.
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