Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a0f4abb42487620…

MALICIOUS

PDF

42.5 KB
MD5: 8c481fdd3287450253d77c7655096ba7 SHA-1: eea85870e8db997d092cd674fbb28d8dbb210ed1 SHA-256: 8a0f4abb42487620ae2df756a23ae356443f931b2519ee65afcf38aee648a8e4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious File T1553.005 Subversion: Mark-of-the-Web Bypass

The PDF file contains embedded content and a script payload, as indicated by multiple heuristic firings including critical detections from ClamAV. The embedded artifact and script suggest the file is designed to execute malicious code upon opening. The ClamAV detection 'Pdf.Exploit.Agent-36830' strongly points to a known exploit targeting PDF viewers.

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
d8a95bc8411bcd5a8e0c7adbd6a08b956a37c15f5fc0381a450ac15be4c1675d		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42745 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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