Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c98108128df6643…

MALICIOUS

PDF

11.8 KB
MD5: d0909f89891f8aae8f3612c134221494 SHA-1: 582a4119591c716268df6b4e4fc7d3fdb5ec7d92 SHA-256: 2c98108128df66432940483093e604a78dae4cfdd4c0c67df5cdacec88e94aaa
126 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by multiple high-confidence heuristics, including ML classification and ClamAV detection. The presence of an embedded script payload and an embedded file strongly suggests that this PDF is designed to exploit a vulnerability and download a secondary payload. The document body content is not indicative of a specific 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
fa9cc6a48272ebd416540ed2e38a8880832eb6f6f13094f5e88d07ff5bebf959
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11351 bytes