PDF malware analysis — malicious · 419bf76e18e1d424

MALICIOUS

PDF

12.3 KB Created: 2009-11-08 19:41:65 Authoring application: PDF Library 8.9.8 (via PDF Library 10.6.4)

MD5: 2db01fa0b187af8a8b24a44c39c30ccf SHA-1: 23a8b6314a35236f11cdedf9f7b3e2f86688861e SHA-256: 419bf76e18e1d42470a676e430f225f880ebcd302b551e6e6cfce604dfc6133f

220 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution T1059.001 Command and Scripting Interpreter: JavaScript T1059.003 Command and Scripting Interpreter: Windows Command Shell

The PDF file contains multiple critical heuristic firings indicating exploitation of CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992. These vulnerabilities are triggered by embedded JavaScript, which is likely used to download and execute a second-stage payload. The presence of deobfuscated JavaScript and the nature of the exploit indicators suggest a sophisticated delivery mechanism, common in exploit kits.

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` `9223de200643e06a0b203bd4c21aee55a7a51d83420343c420efa6ff9a6b5940`	pdf-javascript-stream	PDF /JS object 7 at offset 0x268	37475 bytes
`legacy_pdfkit_stage_000.js` `14d8250dbb23e5745612a85ab91834fd31412bd9ceb090ecda18f18f35534250`	deobfuscated-js	numeric array subtract-key decoded JavaScript at offset 0x268	9880 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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