Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f70b077cc1a1092…

MALICIOUS

PDF

42.7 KB
MD5: c0955732e712725d1e270aad8764d75d SHA-1: d23175eb823a80e2c0fbed0f7bc0a98493f20908 SHA-256: 0f70b077cc1a109285c8dfa722c988c127d2355dbb432218c7219c2ae6a22d62
176 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by multiple engines, including ClamAV, which identified it as 'Pdf.Exploit.Agent-36830'. Heuristics indicate the presence of embedded scripts and XFA forms, common vectors for exploiting PDF vulnerabilities. The embedded artifact, also detected by ClamAV, likely contains the secondary 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 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 script payload in PDF stream low 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 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
e040147e4a34de0ee419d568565eb14fac7fd0962176cfc6b28a7c7cdbe20404		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 43022 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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