PDF malware analysis — malicious · 169bf70db71e4d7f

MALICIOUS

PDF

1.24 MB Created: 2010-07-29 09:43:52 Authoring application: Scribus 1.3.3.14 (via Scribus PDF Library 1.3.3.14)

MD5: 695ce416c23238a8a6d3b3855230fe13 SHA-1: 60d6c41a481cbb407d5f8da9eb3b5641559f3add SHA-256: 169bf70db71e4d7f98a0c1fff416b4b5ec35af63db99727d0fdfa95dd030b0a6

118 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains embedded JavaScript streams that are heavily obfuscated. The script attempts to extract text from the document, process it, and then likely execute a payload. The ML classifier and PDF JavaScript exploit heuristics strongly indicate malicious intent. The specific payload or target is not discernible from the provided evidence, leading to an 'unknown family' classification.

Machine Learning

Nyx PDF Classifier malicious score 0.9876

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.
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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape 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.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL http://www.monotype.comMonotype
- http://ocsp.verisign.com/ocsp/status0
- https://www.verisign.com/rpa0
- http://www.monotype.com/html/mtname/ms_timesnewroman.htmlhttp://www.monotype.com/html/mtname/ms_welcome.htmlhttp://www.monotype.com/html/type/license.html
- https://www.verisign.com/rpa
- http://crl.microsoft.com/pki/crl/products/CodeSignPCA.crl0
- http://www.microsoft.com/typography
- http://www.iec.ch

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0055_001.js` `08f19cad3fe604f0cd7a08ed2844f6f7258459b0df382a84b4fe849214af50b8`	pdf-javascript-stream	PDF /JS object 55 at offset 0x13DBAE	1748 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 7 eval/decoder/string-building token(s).
`javascript_obj0055_002.js` `0a4665a0b00a1790fe25bb65732494e8d2b0fe7443fab811aedf0eaada30c5f6`	pdf-javascript-stream	PDF /JS object 55 at offset 0x13DBD1	3241 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 7 eval/decoder/string-building token(s).

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