Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b412e138bc3b8cc…

MALICIOUS

PDF

11.9 KB
MD5: 043335fe5d92317bbaeace61bdd954ba SHA-1: 8a7485de99351a9fe742b70d25195dbd5f97c66b SHA-256: 2b412e138bc3b8cc35b8a2716a0413006806774be9bee1947c7e66e80b334cf4
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 a critical ClamAV detection (Pdf.Exploit.Dropped-78) and an ML classifier flagging it with a score of 0.999995. The presence of an embedded script payload and an embedded file further indicates malicious intent. While the document body is minimal, the overall evidence points to a PDF exploit designed to drop a secondary payload.

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
f2e7eedf45dbe54a55ee686e466c8733eaef444111e95e61f09dc87c1f72db4c
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11411 bytes