PDF malware analysis — malicious · a2956dfbc4dd6aaf

MALICIOUS

PDF

8.9 KB Created: 2009-11-11 19:44:05 Authoring application: PDF Library 4.2.7 (via PDF Library 4.9.4)

MD5: e84225617e53829d48ebe6c76857f110 SHA-1: 3c18e4edd5eefbf971d1c56834bd5274b6d6df9e SHA-256: a2956dfbc4dd6aaf63e0f12f443b4221aafa0bdf0d7a049db69ca1a99d5fc13c

220 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.002 Malicious Link

The PDF file contains multiple critical heuristic firings indicating exploitation of CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992. These exploits are triggered by embedded, obfuscated JavaScript. The deobfuscated JavaScript, named 'legacy_pdfkit_stage_000.js', likely downloads and executes a second-stage payload, which is a common technique for exploit kits. The file's metadata and structure are consistent with a malicious PDF designed to compromise the user's system.

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` `a76250d3dea8d030200c28f23bd9cceb3bb6f8fe443208ade8e5dec811d14b85`	pdf-javascript-stream	PDF /JS object 7 at offset 0x268	38259 bytes
`legacy_pdfkit_stage_000.js` `a26a3565dd728c3f35fcc33434767dcc8121738e5eb12025f304b9388a2559bd`	deobfuscated-js	numeric array subtract-key decoded JavaScript at offset 0x268	9874 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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