Malicious PDF — malware analysis report

Static analysis result for SHA-256 62a010a0fcfcf5dd…

MALICIOUS

PDF

42.4 KB
MD5: 68147e06b8c9de778fc7a7c072adaf79 SHA-1: b1aa493baf146d46668a49cc92a9460b27200a5b SHA-256: 62a010a0fcfcf5ddb305321c18be0eb679a097c5f764d7d920a5c4ce680ed53e
176 Risk Score

Malware Insights

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

The file is a PDF identified as malicious by ClamAV and an ML classifier, indicating it contains an exploit. Heuristics show an embedded script payload and an embedded file, suggesting the PDF is designed to deliver a secondary malicious artifact. The embedded content is likely responsible for the exploitation and subsequent execution of a 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
535dd7437dc32bc24aa5a6b120947a963f83ef0ff9d8cb389dfcf6ddd0f19aff		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42710 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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