PDF malware analysis — malicious · 9142a5ca901cda30

MALICIOUS

PDF

28.9 KB Created: 2009-10-11 14:10:16 Authoring application: FGhAWCCuyoKnekgeucR (via XOyqNDzzBkCrt)

MD5: 812711451f605c2a9ded557d71fc9788 SHA-1: 039990992b57f591149a85647af950d108a21ec8 SHA-256: 9142a5ca901cda3036c044f19cef068a04a1eaa4b95f240b54fda2905b9e3502

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The JavaScript stream is obfuscated and uses String.fromCharCode, suggesting an attempt to hide malicious code. The embedded artifact 'javascript_obj0015_000.js' and the high confidence PDF_EVAL firing strongly suggest the script's purpose is to download and execute a second-stage payload. The authoring application name 'FGhAWCCuyoKnekgeucR' and a related string 'XOyqNDzzBkCrt' are also extracted.

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.
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_obj0015_000.js` `d9d73e44b0c0e8b4ca54a7fdb306a3142804caa06e67c73a211e878e42c5c2a4`	pdf-javascript-stream	PDF /JS object 15 at offset 0x33BB	15384 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 12 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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