Malicious PDF — malware analysis report

Static analysis result for SHA-256 13535f286ca1802a…

MALICIOUS

PDF

18.9 KB
MD5: 32e80393d191cc6f09379da32a1697aa SHA-1: dcd73ec67576e10986a11c1e6cb3a9086eed2911 SHA-256: 13535f286ca1802acc02f4907c4cbf90117632bb68fe0a35bd3e6afeb632bc4f
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 a critical ClamAV detection (Pdf.Exploit.Dropped-78) and a high ML score, indicating it contains an exploit. The presence of an embedded file and script payload strongly suggests it's designed to download and execute a second-stage malicious payload. The benign URLs present do not appear to be directly related to the malicious functionality.

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
025c6530417ae62c12bc67006f0fb2babfd17c81f3e0cf514939a6fccba768f7
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 18546 bytes