Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cf184792a845f8d…

MALICIOUS

PDF

42.5 KB
MD5: 4a1e69297826ebae5c484888a873add6 SHA-1: 4d60ce647d3d002b1ea6574bdefffeb5e04446cc SHA-256: 4cf184792a845f8dccb86e39f3e739b748e374e59a6727d8aa4bdd3c5069c9b0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by the PDF_EMBEDDED_SCRIPT_PAYLOAD heuristic. This script is likely responsible for exploiting a vulnerability within the PDF reader, as suggested by the CLAMAV_DETECTION heuristic identifying it as Pdf.Exploit.Agent-36830. The script's purpose is to download and execute a second-stage payload. The embedded URLs, while mostly benign or unknown, are part of the document's structure.

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
9ea482430157f0e4bfc765ecc7084c579eac5695a42d5e0c5acd51456d9149bf		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42786 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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