Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4e8a6599b2e1919…

MALICIOUS

PDF

11.8 KB
MD5: 160c5a6d72c992bd4dff5ec4feceec02 SHA-1: d3e2eb8dcccfe5f9c548ae55c137e1e3808830b9 SHA-256: d4e8a6599b2e191936d1850af7885335a8b262732b6f123bf4434634385f7d8e
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. The presence of an embedded script payload and an embedded file suggests the PDF is intended to exploit vulnerabilities and download a secondary payload. The specific embedded file is named 'embedded_file_obj0008.bin'.

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
1977835a6124e2daa3d8208ee92f5b9928f74dec006d30f2a58d3d7481a4d636
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11333 bytes