PDF malware analysis — malicious · 0981ffd085ae8603

MALICIOUS

PDF

9.4 KB Created: 2010-05-14 18:41:54 Authoring application: abXHTglXW (via REEyzj1ufP)

MD5: c9a060eddb0b2b8a1fe62627fbdc5fed SHA-1: 567cc3cd57fcbf1c4308c14416c74a8564997cf0 SHA-256: 0981ffd085ae86032f92e8a9484d483837abc38217432bfdfc29896aece53e7c

148 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 but contains calls to eval(), indicating it is designed to execute arbitrary code. The ML classifier and PDF JavaScript exploit cluster heuristics strongly suggest malicious intent. The script's primary function appears to be downloading and executing a secondary payload, as is common in exploit-based PDF attacks.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

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.
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_obj0007_000.js` `2093a2058f23d8a1080cf9d3d1c569b15485405c4a8d640c44b07e38e4a44ae2`	pdf-javascript-stream	PDF /JS object 7 at offset 0x248	8247 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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