Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eb4f5da4cbcb255…

MALICIOUS

PDF

11.8 KB
MD5: a0c91fcfc790b9e2dd591f700e135188 SHA-1: dc10f875b2053d07e7262f3dd1b4244d9f73d244 SHA-256: 6eb4f5da4cbcb2553c15adf1c585221db3d49b556a3036ec84434cb5698f0ae7
116 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF was flagged by multiple heuristics, including ML and ClamAV, indicating it contains an exploit. The presence of an embedded script payload and an embedded file suggests it is designed to download and execute a secondary payload. The benign URLs present do not detract from the malicious nature indicated by the exploit detection.

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 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 script payload in PDF stream low 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 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
c6095054380879f2eed321c2fbace21f44f7251c80933fe97218d80a4618aa01
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 11343 bytes