Malicious PDF — malware analysis report

Static analysis result for SHA-256 61ebc1aeab0d0813…

MALICIOUS

PDF

42.4 KB
MD5: da5ef719679d97ed1c4963358354dcd3 SHA-1: 27541adc4c84e0583b74382a003055b84e6dff8a SHA-256: 61ebc1aeab0d08136eaba48f80e15c4420994d6b690cca64dc9d658e9708ab17
176 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript

The file is identified as a malicious PDF by ClamAV and a machine learning classifier, indicating it contains an exploit. The presence of embedded script content and an embedded file suggests the PDF is designed to execute arbitrary code, likely downloading and running a second-stage payload. The benign URLs present are likely decoys or standard PDF form-related resources.

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
079261ebe0d4fb23b90fa562f39e09f9f3602abe0de8f6d05a176bb2849e8684		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42639 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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