Malicious PDF — malware analysis report

Static analysis result for SHA-256 238bfabb6143c3aa…

MALICIOUS

PDF

12.1 KB
MD5: 61092c2f49750f37778ca804f1031c0e SHA-1: 8c401d6c0662fb081fa7de069bc7813ec104922a SHA-256: 238bfabb6143c3aac289f925a023bb9e1bfd64318196f7529ae3863260e2bda9
96 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution T1566.002 Phishing: Spearphishing Attachment

The PDF file was detected as malicious by ClamAV with the signature Pdf.Exploit.Dropped-78, indicating it is a known exploit dropper. Heuristics confirm the presence of an embedded script payload and an embedded file, which are common techniques for delivering secondary malware. The XFA form structure and embedded file further suggest a malicious intent to exploit PDF vulnerabilities.

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
9c08f76ed6ea612f7b60b7746c2364dec58e82147d24f9b990c4ca2574930cf9
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 11667 bytes