Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea4b12ec317f674b…

MALICIOUS

PDF

46.6 KB
MD5: 1536a959e3f705c0aebf0f31cef37870 SHA-1: 3ce6a8f8670544c80685031cdf01440d80b07710 SHA-256: ea4b12ec317f674bbdf1ec35c5ecbb3b58528fae80a7ffaf09af47d43758c5c0
186 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.001 Spearphishing Attachment T1027 Obfuscated Files or Information

The PDF file contains embedded script content and is flagged by multiple heuristics, including ML classification and ClamAV, as malicious. The embedded script payload and the PDF structure suggest an exploit is being delivered. The ClamAV detection of 'Pdf.Exploit.Agent-36830' further supports this. The embedded file artifact is likely the delivered payload.

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
980250fd0b218975490191e4799eace783d079f4de2ef19e27159173ac5b7e74		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 46920 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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