Malicious PDF — malware analysis report

Static analysis result for SHA-256 dacf90233e6a7a2a…

MALICIOUS

PDF

19.2 KB
MD5: c31b01de2848c8c5d7df13b34880af4e SHA-1: 2e161a74d7d6ce625901a9613c8884e8df900f71 SHA-256: dacf90233e6a7a2ae3f26cc2db8b35f41bee11cbb1c5daaa369dc163ebb4ca1b
126 Risk Score

Malware Insights

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

The file is identified as malicious 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 strongly suggests it's a dropper or exploit document. The embedded URLs, while not directly malicious, are part of the PDF structure. The ML classifier's high confidence and the ClamAV detection point to a known exploit pattern.

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
98006f7efc7c820a58351a178f3a13b9716dd6180712cd354cce0955548df9b6
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 18872 bytes