Malicious PDF — malware analysis report

Static analysis result for SHA-256 83b12d3ef476c356…

MALICIOUS

PDF

26.4 KB
MD5: 33dd37531c315245947084a853f6ee74 SHA-1: cc102cf21adceeb9119aa99adc879a9fe2d78cc6 SHA-256: 83b12d3ef476c3564afbdfd4e5823e79b8f9d06b0c7ec72d22586c9c2e4dc923
126 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, indicating it's likely an exploit delivery mechanism. The presence of an embedded script payload and an embedded file further supports this. While specific URLs are present, they are not directly indicative of a payload delivery or command and control infrastructure.

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
63159cecc5013d7e212add415b51355c6a88dc7cbb9a3a9b5ac9fa9cd52bad6b
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 26271 bytes