Malicious PDF — malware analysis report

Static analysis result for SHA-256 1493b841bb99846d…

MALICIOUS

PDF

18.8 KB
MD5: 5d39fb038e94929f1a15591ac26a45c2 SHA-1: da8140c81fa8a0827c123e7b1ee26bd6bc4d602e SHA-256: 1493b841bb99846d15249a36836b3b9746e4cbbbef34365d8e12ee76aa5ea755
116 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV with the signature Pdf.Exploit.Dropped-78, indicating it exploits a known vulnerability. The presence of embedded script content and an embedded file suggests it's designed to download and execute a secondary payload. The benign URLs found do not appear to be 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
a9915616cb47bd68f736dbee7ca961833857a5701155c2ad35c7e5cbb25161e8
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 18478 bytes