PDF malware analysis — malicious · 7d952b79c8b2cdeb

MALICIOUS

PDF

7.1 KB Created: 2010-10-12 14:20:47 Authoring application: Bgecolemdisoginelejaci (via 94e8cVinavepleziueti)

MD5: 2e50ad13ad7099af0b0a529c309f637d SHA-1: f64d475e23fececb32e0a90bb937548f6465bcda SHA-256: 7d952b79c8b2cdeb96a0579d2efeeb11deafdc5d11d7ed0d1fde4ae654c3b0fe

366 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains multiple critical heuristic firings indicating exploitation of known Adobe Reader vulnerabilities (CVE-2008-2992, CVE-2009-0927, CVE-2009-4324). These vulnerabilities are used to execute embedded JavaScript, which is further obfuscated and likely serves as a loader for additional malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 8

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)
Pidief-style multi-CVE JavaScript dispatcher critical CVE likely PDF_PIDIEF_MULTI_CVE_DISPATCH

A single JavaScript body branches on app.viewerVersion and invokes two or more of the canonical Reader sinks (Collab.collectEmailInfo, Collab.getIcon, util.printf with a field-width format string). This is the 2009-2010 Pidief.J multi-exploit landing template: a per-version dispatcher that fires the matching CVE chain for whichever Reader version opens the file.
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 3

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
`legacy_pdfkit_stage_000.js` `18699f9d55ae1f1fd22bc427d0f09ac790fd8fafb1557dc66370fe40318c5f52`	deobfuscated-js	getPageWords-XOR Pidief stage normalized at offset 0x0	153 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`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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