PDF malware analysis — malicious · e3400ef9aa5af5dd

MALICIOUS

PDF

4.3 KB

MD5: ae89f9ba910fffad8274ccbc3ba68a86 SHA-1: 0e34d336c631fd6e5459febcbae21aaddbe0e9bb SHA-256: e3400ef9aa5af5dd05bf70af257388fbe48a62fdceb826d2aee1cc6c59228e1f

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. A high-confidence PDF_EVAL heuristic firing suggests that the JavaScript is obfuscated and uses eval() to execute arbitrary code. The String.fromCharCode heuristic further supports obfuscation. The extracted artifact 'javascript_obj26451_000.js' is also flagged as suspicious due to script obfuscation indicators. The primary function of the script appears to be downloading and executing a second-stage payload, though the exact URL or execution method is not directly discernible from the provided evidence.

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_obj26451_000.js` `62fe091b37b0b869061cd34a052d6471b19e0739333d5f9a6b89eadc4ddf197a`	pdf-javascript-stream	PDF /JS object 26451 at offset 0x134	8305 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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