Malicious PDF — malware analysis report

Static analysis result for SHA-256 a726e8b9ca4c17f2…

MALICIOUS

PDF

12.2 KB
MD5: d13fc4082bfe133bb339032fd039b427 SHA-1: 2d2157f3c3423454889e83532d3c1c7b25f9cb79 SHA-256: a726e8b9ca4c17f295ded612b43c73f13ef0536a5fb8853717aee0cf536d50b4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious Link: Malicious File

The PDF file was flagged by multiple heuristics, including ML classification and ClamAV detection as 'Pdf.Exploit.Dropped-78', indicating it contains an embedded exploit or payload. The presence of an embedded file and script payload, along with embedded URLs, suggests a delivery mechanism for further malicious activity. The XFA form structure also points to potential exploitability.

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
94b227c7e8a0206758a6879ef07dec2d63441532087812a31e40217276687014
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11771 bytes