Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b7504422739469c…

MALICIOUS

PDF

12.3 KB
MD5: 13a0353df41961740a6895ae36673de3 SHA-1: 587728b498d4e51b538179cd57b625575a20ee6a SHA-256: 4b7504422739469c99d973d4f28bd561396b7bf8d1aec17791ea4d9d8b4363f4
126 Risk Score

Malware Insights

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

The critical ClamAV detection 'Pdf.Exploit.Dropped-78' and the high ML classifier score strongly indicate malicious intent. The PDF contains embedded script payloads and an embedded file, suggesting it's designed to exploit vulnerabilities and drop further malware. While specific script actions are not detailed, the presence of these elements points to a typical exploit-based PDF attack.

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
dcbb93d79a42a68eb22190c99ca158277808234957dafd3418801265f5bc92b4
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 11804 bytes