Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6851779c3e68ae2…

MALICIOUS

PDF

42.4 KB
MD5: 465a29bf6db2ff65429b3bf98c76529b SHA-1: 15836f195d930df52099ce728d6275fe9b385d17 SHA-256: b6851779c3e68ae205cd97a5712a7d7641681188ec3eb5f3c5f259aa7754420d
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 viewer, as suggested by the 'Pdf.Exploit.Agent-36830' ClamAV detection on both the main file and an extracted artifact. The embedded script's purpose is to download and execute a secondary payload. The confidence is moderate due to the obfuscated nature of the script content.

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
7d48782fdc970342d74699b484df0839c81343eb49d1b97940c23dc2cc0ee5d1		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42695 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

Open this report in the interactive analyzer, or submit your own file for analysis.