PDF malware analysis — malicious · c09988df74fe2f39

MALICIOUS

PDF

5.1 KB

MD5: 3fa3a3aa0c386e133bd5255df82c41b9 SHA-1: e1b7370731e976352e85092168859364ebbeafda SHA-256: c09988df74fe2f3990f41a1dacc1a98fd8c72292dc1bb1681a9270d0aaa95a4a

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, indicated by PDF_JAVASCRIPT and PDF_JS heuristics. The PDF_EVAL and PDF_FROMCHARCODE firings suggest that the JavaScript is obfuscated and uses eval() and String.fromCharCode() to execute arbitrary code. The extracted artifact 'javascript_obj0326_000.js' is likely the source of this obfuscated JavaScript. The primary intent appears to be the execution of a second-stage payload, as suggested by the use of eval and obfuscation techniques common in downloaders.

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_obj0326_000.js` `7a38dea9b4d50421b4b9b7579d622f5f67e1d43e84730d669581b4120467a044`	pdf-javascript-stream	PDF /JS object 326 at offset 0x138	8365 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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