PDF malware analysis — malicious · 5f1eb6da620b338c

MALICIOUS

PDF

1.3 KB Created: 2011-12-09 16:24:00 -05:00 Authoring application: iText 2.1.3 (by lowagie.com)

MD5: 04078d1f720bff5b45ab2e85592ba65a SHA-1: ae543a49b08c7bbf23ff144452b621c20714447d SHA-256: 5f1eb6da620b338c10cea1870d525cbb56b367ca2108cb6079037a60a9757e1a

148 Risk Score

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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.
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (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_obj0001_000.js` `f73e948a1bf25d5f6abca2263340106e44d527a5540c5c6ec2d3a4c976ff63cb`	pdf-javascript-stream	PDF /JS object 1 at offset 0xF	943 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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