Malicious PDF — malware analysis report

Static analysis result for SHA-256 0017b02b04ea8661…

MALICIOUS

PDF

19.5 KB
MD5: c316b9a45ea0d1ace5fb036450beb562 SHA-1: f43946c309ca985428db0deb6f04e4a6080763f4 SHA-256: 0017b02b04ea86610819aa6f70dad38821473ba5a2561003f33ab53908092eed
128 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious Link: Malicious File

The file is identified as a malicious PDF by multiple heuristics, including a critical ClamAV detection for 'Pdf.Exploit.Dropped-78' and a high ML classifier score. The presence of an embedded script payload and an embedded file further indicates its malicious nature. The document body content is obfuscated and does not provide clear user-facing lures, suggesting the attack relies on exploiting a PDF vulnerability.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • ClamAV: Pdf.Exploit.Dropped-78 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-78
  • 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
c81e8ce9641d9b9429ecafe990050ad0a7faa5cb7be6749f6fad33ed2b52b16f
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 19157 bytes