Malicious PDF — malware analysis report

Static analysis result for SHA-256 e58a9009da89a170…

MALICIOUS

PDF

18.8 KB
MD5: f7f0fa6233e8a2fb42889ef6d9623c16 SHA-1: 2766ebddb7b9222ae2851775bef89e93b6bfc915 SHA-256: e58a9009da89a1700c7fbba427e4f19d83da759d5783dcb518fbd476f2cbffe1
126 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.002 Spearphishing Attachment

The file is identified as a malicious PDF by multiple high-confidence heuristics, including ML classification and ClamAV detection (Pdf.Exploit.Dropped-78). The presence of an embedded script payload and an embedded file further indicates malicious intent. While no specific family is identified, the techniques suggest it's a dropper or exploit loader.

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
5d52fd466c20468c8d192b1d6f19dafab2995009ac4b146a4e53f9743e905536
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 18457 bytes