PDF malware analysis — malicious · 08a8c8b9e80d5b69

MALICIOUS

PDF

9.4 KB Created: 2009-09-11 20:37:42 Authoring application: qTYsRSgxYqQQh (via wyAcgdCCTJHwjwBOZdv)

MD5: b33da7ba3ffd7648dfdd8355de193deb SHA-1: 56e245e0723f64f10e38d0fbe3d06c521f183a1f SHA-256: 08a8c8b9e80d5b69536ec29cb67e87146782367074399b31e1c66630cf7117ef

216 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains obfuscated JavaScript that utilizes eval() to execute arbitrary code. This is a common technique for downloading and executing further malicious payloads. The ClamAV detection name 'Pdf.Dropper.Agent-7225976-0' further supports its role as a dropper.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 7

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.
ClamAV: Pdf.Dropper.Agent-7225976-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7225976-0
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.
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.

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `84cd36f1c85508ebd8b06555a983893eeffbe91d1555cd668f827bb2e73ef06a`	pdf-javascript-stream	PDF /JS object 7 at offset 0x41F	2267 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`javascript_obj0007_001.js` `1d3fb7d1061b8f0ae739f6e5bfab76a345b3780333654b51c918639b3e334b96`	pdf-javascript-stream	PDF /JS object 7 at offset 0x41F	2208 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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