Malicious PDF — malware analysis report

Static analysis result for SHA-256 f15bf9845aabc302…

MALICIOUS

PDF

19.1 KB
MD5: 9e2474e87e192d4c15564e1254485eb2 SHA-1: d4dfaaa1e9301eb3a9b9da63f52442b0ad271194 SHA-256: f15bf9845aabc30255dd912cfcf00d1ad4aac89ca59d5e3862c81dedbe2b1dae
126 Risk Score

Malware Insights

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

The file is identified as malicious by multiple indicators, including a high ML score and ClamAV detection as 'Pdf.Exploit.Dropped-78'. The presence of an embedded script payload and XFA form suggests an exploit attempt. While no specific document body text is available for content analysis, the embedded nature and exploit detection point towards a delivery mechanism for a secondary malicious 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
6b0b004b11e6f4a6ea3854020edf5d21a85fa9186a69c0f4c9d766bba204d2e6
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 18788 bytes