Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5068f6c068056e5…

MALICIOUS

PDF

50.1 KB
MD5: 173672f371821ab0d1546a113e970172 SHA-1: 749a52dd9a00de2c25424c8e32e4ce61465f0c02 SHA-256: f5068f6c068056e532cd67bc07c1e267a92cc5bcd995ad294ea84b25a6a55499
166 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious File T1204.002 Malicious File: User Execution: Malicious Attachment

This PDF file was flagged as malicious by ClamAV with the signature Pdf.Exploit.Dropped-93. High-severity heuristics indicate the presence of risky executable script within an XFA form, suggesting an exploit attempt. The ML classifier also strongly indicated maliciousness. The embedded file and script payload point towards the delivery of a secondary malicious component.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • XFA form contains risky executable script high CVE related PDF_XFA_SCRIPT
    PDF embeds an XFA form whose script block contains exploit, submission/launch, or shell-execution primitives. Ordinary LiveCycle print/update scripts are left as generic XFA/JS signals unless stronger behavior is present.
  • ClamAV: Pdf.Exploit.Dropped-93 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-93
  • 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
c7f5a64b5e12e44dc67dc75c1aff62d86ba0a843baa6ac236533f694d4ef036e		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 50591 bytes

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