Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1581aa2302c5bdb…

MALICIOUS

PDF

43.4 KB
MD5: b5ad0de4dd93984e5450eab31439131b SHA-1: bfc5654e8ebbb4bcc302a67c176006657d10ecbe SHA-256: e1581aa2302c5bdbe535543daa6a3665fec1f6701cb770d93dfcbf3175bcbeae
186 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious Link: Malicious File

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating it contains an exploit. The presence of embedded scripts and embedded files further supports this. The embedded URLs, while not directly malicious, are associated with the document's structure and potential exploit vectors.

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
089579e76b457db6ace05f4abea80b480e8a10224100260a72e4634cd3c71ac7		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 43678 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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