Malicious PDF — malware analysis report

Static analysis result for SHA-256 9354ce8cc4fcfa7a…

MALICIOUS

PDF

11.8 KB
MD5: e2763c259ef8374141fba8c322dea657 SHA-1: 07a88bd23acbeb71f6f43707cf46966d6bdf48d7 SHA-256: 9354ce8cc4fcfa7ae46377a09402b2859e705a3888de10004575ee1e32474062
128 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 heuristics, including a critical ClamAV detection (Pdf.Exploit.Dropped-78) and a high ML classifier score. The presence of an embedded script payload and an embedded file indicates an attempt to exploit vulnerabilities. While no document body text was available for analysis, the embedded URLs are likely part of the exploit chain or lure.

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
81ebb35fbb139bb7e28d492cd1fd63e89a9f7f1116cccd4e65b0dfb3e344c36c
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11335 bytes