PDF malware analysis — malicious · 0a2ea9675976a15e

MALICIOUS

PDF

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

MD5: 00d52877424e11f7e1b4ba186bf9fea9 SHA-1: 3b4b4a579e48da61ee4af537b295fd948ce31c4d SHA-256: 0a2ea9675976a15e7e4ba3d356ea3ca3bd4986b098482d72341f5bbcf2ae03b6

188 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF contains embedded JavaScript that is heavily obfuscated and utilizes an eval() call, indicating an attempt to exploit a vulnerability. The ML classifier and heuristic firings strongly suggest malicious intent. The primary goal appears to be downloading and executing a secondary payload, as evidenced by the PDF_LAUNCH heuristic and the nature of the obfuscated script.

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` `ab73db0c7b98a4af67b946a8b8472c72ee0e29abcd8944a67bc68d98255e870b`	pdf-javascript-stream	PDF /JS object 27 at offset 0x1C1B	3256 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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