PDF malware analysis — malicious · 656871e3e4ee1d3f

MALICIOUS

PDF

5.6 KB Created: 2008-09-24 19:47:56 Authoring application: Adobe (via Notepad)

MD5: 0cc5ff7714d3d5f6d90c7ae72d3b9aa0 SHA-1: d419a217935dcdd7bd9ddcbcc6ca20e7a8d19ca5 SHA-256: 656871e3e4ee1d3fde17a68a5bfd6c94f03b35a2496a372e523243357486afdb

208 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file contains embedded JavaScript that exploits CVE-2009-0927 via the Collab.getIcon method. The deobfuscated JavaScript reveals URLs that are likely used to download and execute a second-stage payload. The ML classifier strongly indicates maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

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)
PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER

PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
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_obj0006_000.js` `fc3d245574cd4e36f79e299f56114c07804c842e2d07ad64204062805f86f31e`	pdf-javascript-stream	PDF /JS object 6 at offset 0x137F	258 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`info_trailer_percent_stage_000.js` `fecb2bab87693db8c08c9b1a27ceeb44a73ae1fef16f4d56a13e2ff455188b78`	deobfuscated-js	Info /Trailer percent-placeholder decoded JavaScript (object 5, info object 9) at offset 0x136	3017 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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