PDF malware analysis — malicious · aa47a2881dec785b

MALICIOUS

PDF

5.1 KB

MD5: ad8c60c9cf3f8c74167287ad882b288f SHA-1: cd6e584115b1ec4b71a280cc697d303ada8dc885 SHA-256: aa47a2881dec785b9123f61276035b302ab222de630e8d65507e7bf5b9172515

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The JavaScript stream, named 'javascript_obj139278_000.js', shows signs of obfuscation and utilizes String.fromCharCode, suggesting it is designed to execute malicious code. The primary function appears to be downloading and executing a secondary payload, which is a common technique for malware delivery.

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_obj139278_000.js` `088a9b76fc713fc4b2241738110caff6aaf72da121a1c63397d3c84117270b7b`	pdf-javascript-stream	PDF /JS object 139278 at offset 0x139	8360 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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