PDF malware analysis — malicious · f0d47a0d745dfa65

MALICIOUS

PDF

61.2 KB Authoring application: PyPDF2

MD5: 32c5308fa7ff937e0570b4c86d04a432 SHA-1: 0ad71bfec19431d729d75a89de2da6bd6fd63797 SHA-256: f0d47a0d745dfa65f9ca24fc098e860fb2d1007e2df7b03fe8a0a9cadb18617f

90 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The PDF_EVAL heuristic suggests that the JavaScript is being used to execute arbitrary code, and the ML_NYX_PDF_MALICIOUS classifier strongly supports this. The presence of obfuscated JavaScript files further indicates malicious intent. The primary function appears to be the execution of JavaScript, likely to download and execute a second-stage payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9946

Heuristics 5

eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
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.
PDF paints image(s) but contains no text operators info PDF_IMAGE_ONLY_LURE

PDF has 2 image XObject(s) and the content stream contains no text-emitting operators (BT/ET, Tj, TJ, ', ") in either raw bytes or decompressed streams — this is the screenshot-as-PDF pattern used to bypass text-based scanners and to deliver instructions purely through rendered pixels. It is informational unless paired with invisible links or risky URI context.
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0004_000.js` `87c9017db0947c5be7611de8e10a962c01a6656970a9ddd49caf0658c1523258`	pdf-javascript-stream	PDF /JS object 4 at offset 0x414	7635 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0004_001.js` `a63cf2e1cb854c1802519b22c16d630d22643624ee4b3c6bc9d19b3a2474ff7e`	pdf-javascript-stream	PDF /JS object 4 at offset 0x414	151 bytes

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