PDF malware analysis — malicious · 4d06a1d13315861f

MALICIOUS

PDF

12.3 KB

MD5: 0115bb40445474a66d0bf483fb11aabf SHA-1: e48b72ab1c0608116b4dc9fb674884cc722f011e SHA-256: 4d06a1d13315861f2e7c43731db1ed0e2014588e6685c5e77023f6963a96a53c

318 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious File T1059.001 JavaScript T1204.002 Malicious File: User Execution: Malicious Attachment

This PDF file exploits several known Adobe Reader vulnerabilities including CVE-2009-4324, CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992. These exploits are used to execute obfuscated JavaScript, which is then deobfuscated into 'legacy_pdfkit_stage_000.js'. This script likely serves as a downloader for a secondary payload, as indicated by the heuristic 'Suspicious extracted artifact'.

Heuristics 8

media.newPlayer — CVE-2009-4324 critical CVE exact CVE_2009_4324

PDF 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)
Collab.getIcon — CVE-2009-0927 critical CVE exact CVE_2009_0927

PDF 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)
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)
util.printf — CVE-2008-2992 critical CVE exact CVE_2008_2992

PDF 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)
ClamAV: Pdf.Exploit.Agent-36291 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36291
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_obj0076_000.js` `2d6f188c88f11ee74657522285ac87b9730a3c80f3d2d9a6a710544da254f48e`	pdf-javascript-stream	PDF /JS object 76 at offset 0x369	11519 bytes
`legacy_pdfkit_stage_000.js` `51540a8d31acf5355087e32df81dd678a32b7cac0ce4603579bbf41d2afa02b8`	deobfuscated-js	string-index array decoded JavaScript at offset 0x369	3852 bytes
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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