Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad47cdc133f43b7a…

MALICIOUS

PDF

42.5 KB
MD5: eee1159dcbe26714573e63155086dc3e SHA-1: 28a180ea803e45996617c672a5d1f110b7f0a605 SHA-256: ad47cdc133f43b7a42da8916f485844718e0ca7f1b7d7847882cd1043d5565cd
186 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious File T1204.002 Malicious File: User Execution: Malicious Attachment

The file is identified as malicious by multiple heuristics, including ML classification and ClamAV detection (Pdf.Exploit.Agent-36830). It contains an embedded script payload and an embedded file, indicating it's designed to exploit vulnerabilities within the PDF reader. The presence of XFA form elements and embedded URLs further supports its malicious nature as a delivery mechanism for exploits.

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
b90428a7086f442e4a08ea0196aa2ae2b0a9ca8ffc521791a93c37f73afafd19		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42752 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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