PDF malware analysis — malicious · fb66b366ac743774

MALICIOUS

PDF

8.3 KB Created: 2009-11-11 19:42:56 Authoring application: PDF Library 2.4.1 (via PDF Library 9.2.4)

MD5: 20fd18aff384323dfa7bd50b4ea66d94 SHA-1: 253aea8d72e1fb20aac78360bd51891d513ddf76 SHA-256: fb66b366ac743774c5a49ede74afb3d7b8710869726ddb42373eff4afb6e98fa

220 Risk Score

Malware Insights

MITRE ATT&CK

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

This PDF document is malicious and exploits multiple Adobe Reader vulnerabilities including CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992. The embedded JavaScript, found in 'legacy_pdfkit_stage_000.js', is obfuscated but the heuristics indicate it decodes and executes a payload. The primary attack vector is likely the exploitation of these known CVEs via the embedded JavaScript, leading to the download and execution of further malicious content.

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` `f691bdc4d2952bea98b66a3b7307fc9a763d94fb3b9ce395f9ab1e88a6e7b567`	pdf-javascript-stream	PDF /JS object 7 at offset 0x268	36851 bytes
`legacy_pdfkit_stage_000.js` `041c274133ff31381f04c66889487dfe8acba04ed9b04286cc6dfd326c5fc078`	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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