PDF malware analysis — malicious · 0398945c93a359a7

MALICIOUS

PDF

7.1 KB Created: 2010-10-12 14:20:47 Authoring application: Bgecolemdisoginelejaci (via 3e487Vinavepleziueti)

MD5: d7adfa0b49efdd2a8163420cf0ed5328 SHA-1: dd4a35d44bb35f24c0106546312402f5ae97c5b8 SHA-256: 0398945c93a359a7f63532ad0668272b87f97ddc05f7be7f4bca9efc98cc733f

306 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF contains multiple critical heuristic firings indicating the exploitation of known Adobe Reader vulnerabilities. The embedded JavaScript, obfuscated and XOR-decoded, is designed to execute arbitrary code, likely downloading a secondary payload. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 7

media.newPlayer — CVE-2009-4324 critical CVE exact CVE_2009_4324

PDF JavaScript calls media.newPlayer — CVE-2009-4324 is a use-after-free in Adobe Reader's multimedia plugin triggered by media.newPlayer(). Actively exploited as a zero-day in December 2009. (identified after JavaScript deobfuscation)
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)
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)
Multi-CVE Adobe Reader JavaScript exploit kit critical PDF_ADOBE_READER_MULTI_CVE_JS_KIT

One recovered JavaScript stage contains multiple version-gated Adobe Reader exploit branches. This is stronger evidence than independent API keywords: the PDF is selecting old Reader vulnerabilities by viewer version and running heap-sprayed Acrobat JavaScript exploit paths.
Suspicious extracted artifact medium 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.
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.

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0010_000.js` `9831312efd52fddc921fa42b5f0524183ce37990ed0b97fffae684698b8a4b87`	pdf-javascript-stream	PDF /JS object 10 at offset 0x1291	2403 bytes
`page_word_xor_stage_000.js` `444f6419aa3ad11f5771853dfe35a7533b9a7394226c729ffe069624be3b11f0`	deobfuscated-js	page-word continuous-hex XOR decoded JavaScript (decompressed, key=0x5D) at offset 0x8C	6786 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 3 long hex-escaped blob(s).

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