Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbe58116c4e7eaf4…

MALICIOUS

PDF

5.6 KB
MD5: 11b242e490686597dec13083a078a0ab SHA-1: e27189a12c39862f21797bbb6cb4a1195736c689 SHA-256: bbe58116c4e7eaf4cf7ea3748d9f6e64a0eb2cc7c6547813da7d6d68b6d49800
68 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF sample was flagged as malicious by an ML classifier with high confidence. It contains an embedded script payload and an embedded file, indicating it's designed to deliver and execute further malware. The embedded file 'embedded_file_obj0008.bin' is the primary IOC. The XFA form suggests a potential exploit 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/xfa-template/2.5/
    • http://www.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin
e1b3c6cd95219764e536a4198d893c25e157927959f950d72dff89d8a0e7aed5		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0x78 5069 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 4 long base64-like blob(s).

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