Malicious PDF — malware analysis report

Static analysis result for SHA-256 e54cc33fda3ce971…

MALICIOUS

PDF

6.1 KB
MD5: f4fc83ee55030f837ea473b7b3c5e2cf SHA-1: 37ae74c89a65df2ab6a8b8408b5c82dd6aa38657 SHA-256: e54cc33fda3ce971757609d3d696e2051f646d914d06ce909d93c51ff35bcd56
86 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The presence of an eval() call within the JavaScript stream (PDF_EVAL) strongly suggests that the script is designed to execute arbitrary code. The ML classifier also flagged this PDF as malicious. While no specific URLs or further script content were extracted, the pattern indicates the PDF is a delivery mechanism for executing malicious JavaScript, likely to download and run a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9761

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. (matched inside decoded stream)
  • 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. (matched inside decoded stream)
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/xap/1.0/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/pdf/1.3/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000166f.js
a90cb80145dd54af9448eb1f06c37f824eee693dbb624a0185d90b496816dc8b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x166F 167 bytes
objstm_0023_00.bin
c67fc8695320174c0994f7d43985c52ab897e5836c45cb321f3ce84d69210491		 pdf-objstm-decoded PDF /ObjStm 23 0 obj (inflated) 346 bytes

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