Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c773b6df67d77a5…

MALICIOUS

PDF

12.1 KB
MD5: 85ac8db341d29bd5617ebdae72df39c5 SHA-1: e68d7f3e6c1a6e5212857ce89c25e0695281bc43 SHA-256: 8c773b6df67d77a52362cacc4fe32be91c0e21575ccbf64426a43d7c5d104360
96 Risk Score

Malware Insights

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

The critical ClamAV detection and the presence of an embedded script payload strongly indicate malicious intent. The PDF structure also contains embedded files and XFA forms, which are sometimes used to hide malicious content. The embedded URLs, while not directly malicious, are part of the document's structure.

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
cb548fd642d8799fddf895be7b376b2259bbe4a6c0ac4acbf7f5548b9fc67012
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 11679 bytes