Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f018a4cbce50238…

MALICIOUS

PDF

42.4 KB
MD5: 8a83e8b9fc7fba102cba94bf1b633fa6 SHA-1: 9bbeb42912f37a782fee6fa260093aed882c00b5 SHA-256: 4f018a4cbce502385598dfc84e8342217be4cb7ca3e0257c2aa17e572d65201c
156 Risk Score

Malware Insights

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

The critical ClamAV heuristic 'Pdf.Exploit.Agent-36830' indicates the PDF exploits a known vulnerability. The 'PDF_EMBEDDED_SCRIPT_PAYLOAD' heuristic further confirms the presence of an embedded script designed to deliver a malicious payload. The embedded file artifact also suggests a secondary stage of execution. The document body contains obfuscated JavaScript, making it difficult to determine the exact payload, but the overall pattern points to a malicious PDF exploit.

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
20b2f52230d85075da66af68209d9e0c255d00ddd0fbf0b8dd6c936cbc1e58c5		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42656 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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