Malicious PDF — malware analysis report

Static analysis result for SHA-256 80af97950f980204…

MALICIOUS

PDF

42.7 KB
MD5: bf70dcdba4d4c0cfc0e4ff9cd9ad1573 SHA-1: 6d68909c9bcf622c6be135a3549cb327d7435a14 SHA-256: 80af97950f980204a0f4a44b0a95f5082a1326336da4d119cf161028eb4cc91d
186 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious File T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The critical ClamAV detection and ML classifier score strongly indicate malicious intent. The PDF contains an embedded script payload and an embedded file, suggesting it is designed to exploit vulnerabilities. The presence of XFA forms and embedded scripts points towards a delivery mechanism for further malware. The extracted URLs are related to XFA schemas and Adobe, which are often used in PDF exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • ClamAV: Pdf.Exploit.Agent-36830 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36830
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • 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
  • 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
f89e6b421596fd7cb2cbb48254bc59eca1cbe272180a78cff70056607dffb802		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 43016 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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