PDF malware analysis — malicious · 56215da03468fd1e

MALICIOUS

PDF

58.3 KB Created: 2009-07-13 16:35:03 Authoring application: tIFKPvYtQPDZJGAidXfFONwe (via eXDWfTOIPlcDbLswb)

MD5: 8e0c5827a8cb183a72061c31cae153d1 SHA-1: 3494d48da7054cb063e2251928aa5c5a7c55a86a SHA-256: 56215da03468fd1ed8ba7a854866b80d42db14e0673dbac9a66c10acddb7250e

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The JavaScript stream, named 'javascript_obj0009_000.js', is heavily obfuscated using String.fromCharCode and eval() calls, suggesting malicious intent to hide its functionality. The primary goal appears to be downloading and executing a secondary payload, a common technique for initial access.

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_obj0009_000.js` `bfe29e62efd1b23adb22e913ba52ab232295cebff4047e537ba9df0d3fe43dee`	pdf-javascript-stream	PDF /JS object 9 at offset 0x674	57134 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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