Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8db7081c9b134ee…

MALICIOUS

PDF

19.0 KB
MD5: a8cfdf10666d50b4662730cf63c22a2f SHA-1: 188263d867be8617468565d73bd2e65f2e8179d7 SHA-256: a8db7081c9b134ee74416bf06f95c9897e0a28c0f5d36e7099b309466e014c21
126 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including ML classification and ClamAV detection, indicating malicious intent. The presence of an embedded script payload and an embedded file suggests the PDF is a dropper or exploit document. The specific ClamAV detection 'Pdf.Exploit.Dropped-78' further supports this. No document body text was available for analysis, but the embedded artifacts and heuristics strongly suggest a malicious exploit delivery mechanism.

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 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
cd10d0caeb110411b5f534fd16f2f2982dda29b1918e680d62b9f3b6e2668d28
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 18719 bytes