MALICIOUS
358
Risk Score
Malware Insights
MITRE ATT&CK
T1059.001 PowerShell
T1204.001 Malicious Link
T1059.007 JavaScript
The PDF file contains obfuscated JavaScript that leverages multiple known vulnerabilities including CVE-2009-4324 (media.newPlayer), CVE-2009-0927 (Collab.getIcon), CVE-2007-5659 (Collab.collectEmailInfo), and CVE-2008-2992 (util.printf). The JavaScript is reconstructed using a character table and then evaluated, indicating an attempt to exploit these vulnerabilities to achieve arbitrary code execution. The ClamAV detection 'Pdf.Exploit.Dropped-91' further confirms its malicious nature. The primary attack pattern involves exploiting these specific PDF reader flaws.
Heuristics 9
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media.newPlayer — CVE-2009-4324 critical CVE exact CVE_2009_4324PDF JavaScript calls media.newPlayer — CVE-2009-4324 is a use-after-free in Adobe Reader's multimedia plugin triggered by media.newPlayer(). Actively exploited as a zero-day in December 2009. (identified after JavaScript deobfuscation)
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Collab.getIcon — CVE-2009-0927 critical CVE exact CVE_2009_0927PDF JavaScript calls Collab.getIcon — CVE-2009-0927 is a stack buffer overflow in Adobe Reader triggered by Collab.getIcon() with a crafted argument. Allows arbitrary code execution. (identified after JavaScript deobfuscation)
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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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util.printf — CVE-2008-2992 critical CVE exact CVE_2008_2992PDF JavaScript calls util.printf() — CVE-2008-2992 is a stack buffer overflow in Adobe Reader triggered by a long format-specifier argument. Widely exploited in the wild after disclosure. (identified after JavaScript deobfuscation)
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ClamAV: Pdf.Exploit.Dropped-91 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Exploit.Dropped-91
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Character-table JavaScript eval stager high PDF_JS_CHAR_TABLE_EVAL_STAGERPDF JavaScript reconstructs an exploit stage by indexing into a small character table, appending hundreds of one-character fragments, joining the array, and evaluating the result. This static fallback fires only after the bounded decoder recovers an exploit-like stage, so it catches this obfuscation even when no single CVE API signature is available.
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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.
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Suspicious extracted artifact info 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.
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
javascript_obj0076_000.js756966451bc92024fce5b6056c868b2970ada2265c74b15c41bcc0d267615c99 |
pdf-javascript-stream | PDF /JS object 76 at offset 0x42D | 61265 bytes |
eval_char_append_stage_000.js813dca2b81237d4721617f0b4c515cdfb27ce6f125e7bb9d10174d40c12ebc82 |
deobfuscated-js | eval character-table append decoded JavaScript at offset 0x479 | 3606 bytes |
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Detection
ClamAV:
No threats found
Obfuscation or payload:
likely
Carved artifact contains 11 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
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deobfuscated.js1ad58e529f1b73114a4a649996316e2542f8ab8bc4cd75ece59a285e86171946 |
deobfuscated-js | PDF JavaScript deobfuscation pass | 65472 bytes |
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