PDF malware analysis — malicious · 8c0a621e12450fef

MALICIOUS

PDF

28.0 KB Created: 2010-03-13 09:18:38 Authoring application: qQmZSBUUZ (via budJd)

MD5: b6be6e9e44071f12b01c16c968357cd5 SHA-1: 1cd1b47a7895116d565ea08223a304bd9006120f SHA-256: 8c0a621e12450fefd455268b185bd37e435bbc48b313be6449d58893a7261cf5

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The JavaScript stream includes an eval() call, a common technique for executing obfuscated code. This suggests the script is designed to download and execute a secondary payload. The obfuscation and use of eval() make it difficult to determine the exact nature of the payload without further dynamic analysis, hence the 'unknown family' classification.

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_obj0007_000.js` `37b3ae0c29ed45a2419873d7dc0ac8e44c546ca2ce9a630e71626a50e30522b8`	pdf-javascript-stream	PDF /JS object 7 at offset 0x239	27500 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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