Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e00e6ed4e78d2c6…

MALICIOUS

PDF

9.0 KB
MD5: 99e91a53f90cde1494ec4c83f46b84c7 SHA-1: 596d62cee7748fd92d10622e369b3ace79315092 SHA-256: 0e00e6ed4e78d2c68526b5ed551baba1ea494f1e22fdd85f16213c4a3bc0eef9
148 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF sample contains embedded JavaScript, indicated by PDF_JAVASCRIPT and PDF_JS heuristics. The presence of PDF_EVAL and PDF_JS_EXPLOIT_CLUSTER suggests the JavaScript is designed to exploit a vulnerability and execute code. The ML classifier also flagged the PDF as malicious. No specific URLs or further script details were extracted to identify a second-stage payload or specific family.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7008

Heuristics 5

  • PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER
    PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
  • 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_002_off00000329.bin
957644f9a4480ec519b70af7e34dcc36c73ea413ad441e16cc9424f644616730		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x329 4690 bytes
objstm_0024_00.bin
0194e41cf74da36a74269c4bef6e0ec253574936e04fc21b582718388cb1dcfd		 pdf-objstm-decoded PDF /ObjStm 24 0 obj (inflated) 385 bytes

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