Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec20b150c1f39bca…

MALICIOUS

PDF

42.2 KB
MD5: da3a7fc20e5d5180720d2ec454c97170 SHA-1: 151499a0e60b8dbee1109d274d5638c395dc0292 SHA-256: ec20b150c1f39bca2f6f1d0b9b0218863337df9be02ff5d0eefc7d94cba3d907
108 Risk Score

Malware Insights

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

The PDF file contains embedded objects and triggers an eval() call, indicating an attempt to execute malicious code. The ML classifier strongly flags this PDF as malicious. The presence of embedded script payloads and extracted files like 'embedded_file_obj0010.bin' suggests the document is designed to deliver and execute a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 6

  • eval() call high PDF_EVAL
    eval() found — commonly used for obfuscated exploit execution
  • Embedded script payload in PDF stream medium PDF_EMBEDDED_SCRIPT_PAYLOAD
    PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • 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.
  • 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://ns.adobe.com/xdp/
    • http://www.xfa.org/schema/xci/1.0/
    • http://www.xfa.org/schema/xfa-template/2.5/
    • http://ns.adobe.com/xtd/
    • http://www.xfa.org/schema/xfa-data/1.0/
    • http://ns.adobe.com/xfdf/
    • http://www.xfa.org/schema/xfa-form/2.8/

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin
04462f810d6eacdacecc9d0a5f3f81bebc722af4415e04da19b520338f642b51		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xD7 67 bytes
embedded_file_obj0009.bin
45b9c822d3f43dce28e4bd08aaf44fa5b6aeb03219f5b6e0ef02c0da01e80b34		 pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x162 790 bytes
embedded_file_obj0010.bin
4bf827139d706dab5c6c984e1660e9a4084f31449d250e28f276e186d078c22f		 pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x4C3 118 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).
embedded_file_obj0011.bin
a370aebc5bb08beb7094820408c588c6e4b443ff5a533c2111278896d7a71c5e		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x584 40880 bytes
embedded_file_obj0012.bin
6dfc2cfc739bf5cd5514e048143c782a1af7b4c86ed10bd88203471efa9b3fe7		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0xA57F 389 bytes
embedded_file_obj0014.bin
9f69c42e66b0c1666412737dc9cf4aa42379ee793c4ad8d07130781756ea33d5		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0xA74E 65 bytes
embedded_file_obj0015.bin
129e4e726ddafc353e13bd03f15fd4d48ceb50aa28924bc8b406e3be1073b46a		 pdf-embedded-file PDF EmbeddedFile object 15 at offset 0xA7D5 146 bytes

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