PDF malware analysis — malicious · 90be30270e5a9e24

MALICIOUS

PDF

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

MD5: 17cb730d74a860cb38861a72aec17bd7 SHA-1: 6016db9931b3160f63dddc8be2428309ba491657 SHA-256: 90be30270e5a9e24f1f9a7bffc2b0e72b219719f7b8085c155a53314a8bc1598

128 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1566.001 Spearphishing Attachment 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 attempt to launch an external process. The PDF_EVAL heuristic points to the use of eval(), a common technique for obfuscating malicious JavaScript. 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.

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` `30958d69e2077e3b1dc7228d3207bd9afd524e0764b414731240784fa54b3079`	pdf-javascript-stream	PDF /JS object 27 at offset 0x1C1B	3323 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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