PDF malware analysis — malicious · eae9e724e28a380b

MALICIOUS

PDF

5.1 KB

MD5: d6b1cd2c7ed7ccb5018027e5fb6d4c33 SHA-1: f6bd8cff6702145d5c21321f54df3a3c1ed434d7 SHA-256: eae9e724e28a380b8c95048f0ba9c47a06d5f0ccbbd0c5cd10e9962038d3026a

96 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript that utilizes eval() and String.fromCharCode, indicating obfuscated code execution. The ML classifier strongly flagged this PDF as malicious. The embedded JavaScript file, 'javascript_obj78054_000.js', is the primary artifact suggesting the execution of a malicious script, likely for downloading and executing further stages of an attack.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

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. (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_obj78054_000.js` `12ddbc0d8bd3fe611cab6bfd4deb8e3486d89f1596848795ae362efe26d04b48`	pdf-javascript-stream	PDF /JS object 78054 at offset 0x139	8354 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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