PDF malware analysis — malicious · e81284f26a3d61f3

MALICIOUS

PDF

1.95 MB Created: 000 Authoring application: Norman (via German)

MD5: ecfcf1209e5d1894b2630f7a5e7c3f3c SHA-1: 267a0cf9d3e6da01fbb99b9a8c9a1f153c6c160e SHA-256: e81284f26a3d61f35833e4b0c435bb0fbb832538327c5342fb00f4472bef9e54

90 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

This PDF file was flagged as malicious by an ML classifier and contains embedded JavaScript. The JavaScript stream is obfuscated and utilizes an eval() call, indicating it's designed to execute arbitrary code. This behavior strongly suggests the PDF is a dropper or downloader for further malicious activity, such as fetching and executing a second-stage payload from a remote source. The presence of JavaScript actions and embedded JS streams, along with the ML classification, supports this assessment.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 4

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.
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` `136a179000b7fb8f3d5b3613385bf3d6714507fa118fa9a86feaa5359316e04c`	pdf-javascript-stream	PDF /JS object 13 at offset 0x381	144317 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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