Malicious PDF — malware analysis report

Static analysis result for SHA-256 8739c2b85dd0542e…

MALICIOUS

PDF

12.2 KB
MD5: 55abb9bae7cfa845d91a5a6b55573bdc SHA-1: 81bdfa09bec9219fa92bd1dcd44f8bd3e808ff70 SHA-256: 8739c2b85dd0542e65692341b6bf2d025a1809327b039e9ee44be9bda395ef30
96 Risk Score

Malware Insights

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

The critical ClamAV heuristic 'Pdf.Exploit.Dropped-78' indicates this PDF is designed to exploit vulnerabilities. The presence of an embedded script payload and an embedded file further supports this, suggesting the PDF likely attempts to download and execute a second-stage payload. The document body content is not indicative of a specific lure.

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
9e41b7fbb7a0bfe41803b40db84d8570e1f46c889828e1c65482cef91b26418a
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 11700 bytes