PDF malware analysis — malicious · a2ec9d2545cf20cf

MALICIOUS

PDF

8.9 KB Created: 2009-11-07 19:42:34 Authoring application: PDF Library 8.3.1 (via PDF Library 7.4.1)

MD5: 2fe2270246c9636966c9d4026abca2ef SHA-1: f457ccd92ac63e66095629af5325f990727350b0 SHA-256: a2ec9d2545cf20cf872d7e23ff73be3c5d8b28e9a4ba2e96c62aa16c4b5004e7

220 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

This PDF file exploits multiple known Adobe Reader vulnerabilities including CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992. These exploits are triggered by embedded JavaScript, which is obfuscated and decoded using techniques common in legacy exploit kits. The primary function of the script appears to be downloading and executing a second-stage payload, although the exact nature of the payload cannot be determined from the provided evidence.

Heuristics 7

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)
ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX

Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
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` `7e19d7a81c0a6ccc18c45e2a24203f0f746baae6b7e436b2e934baac25b762da`	pdf-javascript-stream	PDF /JS object 7 at offset 0x268	38159 bytes
`legacy_pdfkit_stage_000.js` `14741a92db69ecb6ea6cbfd71d092dd3dcd0dc0068062270b85ff19a6f59f57d`	deobfuscated-js	numeric array subtract-key decoded JavaScript at offset 0x268	9868 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 9 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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