PDF malware analysis — malicious · 4fb516250a353fb7

MALICIOUS

PDF

8.8 KB Created: 2009-11-08 19:48:35 Authoring application: PDF Library 2.9.7 (via PDF Library 4.9.6)

MD5: 2bdc295ab1e3498939fbe784b95392d0 SHA-1: e2fd5fee6c02085d121e4acb6c7b0e8d693e77f1 SHA-256: 4fb516250a353fb762eeca57b3d81c4a047fe4b7474008b5245f3b036d6faf1f

220 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1059 Command and Scripting Interpreter T1059.007 JavaScript

This PDF file exploits multiple known Adobe Acrobat vulnerabilities including CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992. These exploits are triggered by embedded JavaScript, which is heavily obfuscated. The deobfuscated JavaScript, named 'legacy_pdfkit_stage_000.js', is likely responsible for downloading and executing a second-stage payload. The presence of multiple exploit triggers suggests a sophisticated delivery mechanism.

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` `81f40e031ff6940e97a42e930fda87cb056d52dd6ff1f8d07069dc6fd3706382`	pdf-javascript-stream	PDF /JS object 7 at offset 0x268	38093 bytes
`legacy_pdfkit_stage_000.js` `81d0b3a7e856f584a392e177fab54d39c826628f8908a505d36d3a720268a12a`	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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