PDF malware analysis — malicious · d11521c44335e5b6

MALICIOUS

PDF

8.3 KB

MD5: 017eec5bc3392b5ac4da91e071322460 SHA-1: 80ddef3fdcdf3b7d44b42da2afb3874648de51ad SHA-256: d11521c44335e5b6fd7d55bcac2a8da33e385bc682040b7bb5802a026946c5eb

96 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript

The PDF document contains embedded JavaScript, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT' and 'PDF_JS'. The presence of 'PDF_EVAL' and 'PDF_FROMCHARCODE' suggests the script is likely obfuscated and designed to execute arbitrary code. The ML classifier strongly flags this PDF as malicious. The embedded JavaScript, named 'javascript_obj0013_001.js', is the primary mechanism for delivering the malicious payload.

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` `6dc092b27eb10a08fad76f07b501650a6a6890bcdf87ddb50de99d9ae39d8e57`	pdf-javascript-stream	PDF /JS object 13 at offset 0x368	14806 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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