PDF malware analysis — malicious · 196e61723b0b0c67

MALICIOUS

PDF

9.6 KB Created: 2007-18-65 42:75:00 Authoring application: Able Alive (via About Able)

MD5: e50464d7994cd775cf56f98a07dce26a SHA-1: 652eda1adeb3eccdd87af17813f5190cf31354f1 SHA-256: 196e61723b0b0c6742abcfd69a3a165a3b873a7fda927c92dbed354c419d6ee8

116 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 that is heavily obfuscated and appears to be designed to exploit a vulnerability. The ML classifier strongly indicates maliciousness, and the presence of JavaScript points towards an attempt to download and execute a second-stage payload. The obfuscated nature of the script and lack of clear indicators for a specific family lead to a slightly reduced confidence.

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.
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. (matched inside decoded stream)
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_obj0013_002.js` `9a9dc8746a0d51a2df66aabdc5e661b4fa9ab7c22b900bc1862aa812b8c4219a`	pdf-javascript-stream	PDF /JS object 13 at offset 0x394	56851 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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