PDF malware analysis — malicious · cd140c680d713ef7

MALICIOUS

PDF

9.6 KB Created: 2009-02-19 14:45:49 -02:00 Authoring application: Writer (via OpenOffice.org 3.0)

MD5: edd89c7553a527d936d89c60463e3287 SHA-1: 4f1ec8317949ef2cd30fd287e0f2928976de6823 SHA-256: cd140c680d713ef72c37807e304a364923898c22d03ee0063c4162f9b72dff3b

128 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The PDF_LAUNCH heuristic suggests an action is triggered upon opening, and the PDF_EVAL heuristic points to the use of eval() for obfuscated code execution. The ML classifier strongly flags this PDF as malicious. The embedded JavaScript file, 'javascript_obj0027_000.js', is the primary artifact, likely responsible for downloading and executing a secondary payload, which is a common technique for initial access.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

Launch action high PDF_LAUNCH

PDF contains a /Launch action with an unresolved or extension-less target — treat as potentially dangerous
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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0027_000.js` `da98a40c650c7bda0a8bc2129dd1b3dffe0bb2a7175b0c7f46756222b6c2e694`	pdf-javascript-stream	PDF /JS object 27 at offset 0x1C1B	3368 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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