PDF malware analysis — malicious · 4781e89ae9a04599

MALICIOUS

PDF

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

MD5: e6fcb0dd50aac4188c7786cecc1d2745 SHA-1: 797d83c11cb8b87ed60ba0594cf8b09065cba99b SHA-256: 4781e89ae9a04599c60ef77908b9d6c779d5e6611fbb145b89cd1e9bfa0c4e52

128 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File T1566.002 Spearphishing Attachment

The PDF contains embedded JavaScript, indicated by PDF_JAVASCRIPT and PDF_JS heuristics. The PDF_LAUNCH and PDF_EVAL firings suggest that this JavaScript is intended to be executed automatically upon opening the document, likely to exploit a vulnerability and download a secondary payload. The ML classifier strongly supports the malicious nature of this PDF. No specific family could be identified, but the attack pattern is consistent with a malicious document designed to exploit users.

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` `1596489b70ac5de83490783fc976a15181d1dd4beebebaebdd9910aef42f7f8d`	pdf-javascript-stream	PDF /JS object 27 at offset 0x1C1B	3200 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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