Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b214d4e72b34f30…

MALICIOUS

PDF

42.8 KB
MD5: edc2411c375b8390b2eda9d2ea39024a SHA-1: e4dd72bd1d92d8ac3ced44a777b5f88959210474 SHA-256: 8b214d4e72b34f30d6faa6e20f149b7533c72795fd4e3471968c20c579a2bf35
186 Risk Score

Malware Insights

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

The PDF was flagged by multiple high-severity heuristics, including ML classification and ClamAV detection, indicating it contains an exploit. The 'PDF_EMBEDDED_SCRIPT_PAYLOAD' heuristic suggests the presence of malicious script content within the PDF stream, likely responsible for delivering the payload. The embedded file artifact further supports the malicious nature of the document.

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
f80cd95fbc0246d9fb29134095a3b81b293d1023d990e697e85713c9b9a03a4a		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 43029 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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