PDF malware analysis — malicious · 034b3abb3bc7d922

MALICIOUS

PDF

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

MD5: c177d56f30b1b697cbb246e17105ab40 SHA-1: 46224aefed6712785d990fbd8e249e8a54007b45 SHA-256: 034b3abb3bc7d9222dd80d9a5ec4bc8ec0277f1cb162541e08f1ff5fafb5e612

188 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript that is heavily obfuscated. Heuristics indicate this JavaScript is likely an exploit attempting to execute a second-stage payload. The presence of PDF_LAUNCH and PDF_JS_EXPLOIT_CLUSTER firings strongly suggests this is a malicious document designed to exploit vulnerabilities and download further malware. The ML classifier also flagged this PDF with high confidence.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

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.
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` `b935216a9bb5afce396eb2fe8544b10f746866de57e740d7a6abf5933cadad8e`	pdf-javascript-stream	PDF /JS object 27 at offset 0x1C1B	3297 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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