Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dcf8e6f7152c197…

MALICIOUS

PDF

10.8 KB Authoring application: Jvbttgoitydywzn Ehirbfshbqnhur
MD5: ce7b558810e2aa4db3ad078e0b2a7d94 SHA-1: 19419969b38b2d9673da47c8501965b3c599c393 SHA-256: 2dcf8e6f7152c197f3f6219a7c2d24b7175629e0783cef54bc361f19c5a9c7db
68 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious File T1204.002 Malicious File: User Execution: Malicious Attachment T1059 Command and Scripting Interpreter T1059.001 Command and Scripting Interpreter: PowerShell

The PDF sample was flagged by a machine learning classifier as highly malicious. It contains an embedded script payload and an embedded file, indicating an attempt to deliver a secondary stage. The embedded URL, http://www2.x5gez7ib7.dnset.com/, is likely used to download and execute this payload. The presence of XFA forms and embedded scripts suggests a sophisticated attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://www2.x5gez7ib7.dnset.com/?zowvvud7=ntLk2rPa3JyeqtDJt2ygknCg4%2Bvis9uVnK2bnJqvbZ3FXe7itKepqZdwqGmglrNd1dV0q5%2BnrZzWxpnqcrm5xV3Zy5u3op3pmg%3D%3D&quot
    • 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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin
ff4105ffba6d034f8aed85f72623b8f04ffd497629d5669c49fe624d879e08a9		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0x35D 10007 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).

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