PDF malware analysis — malicious · 421a49c0e7cc5296

MALICIOUS

PDF

8.3 KB

MD5: bafbdf6bba3d0cdc19dc12002a942a5d SHA-1: 30c6e61b6bbe64b06e1e1c4f6e61dc74ba3c9b41 SHA-256: 421a49c0e7cc5296d118269889e338a6519328d8ce49877e7950c597fa13cca5

96 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, indicated by PDF_JAVASCRIPT and PDF_JS heuristics. The presence of PDF_EVAL and PDF_FROMCHARCODE suggests the JavaScript is obfuscated and uses eval() to execute arbitrary code. The ML classifier strongly flags this PDF as malicious. While the exact script functionality is obscured, the combination of these indicators points to a malicious PDF designed to exploit vulnerabilities and execute a payload. No specific family could be identified.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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_obj0013_001.js` `7c07ec562210eee0ab6e18832ce44cc307e1d7948fff491da6512772dde1620b`	pdf-javascript-stream	PDF /JS object 13 at offset 0x368	14701 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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