Malicious PDF — malware analysis report

Static analysis result for SHA-256 09a1c6d1a95bf540…

MALICIOUS

PDF

11.7 KB
MD5: 450a2257f464367b15c0e0f42b7e0dd2 SHA-1: 0c9fb459548e35fdd7b11867958bf67aa43bb6ba SHA-256: 09a1c6d1a95bf540f3a96c3012aa9f4c0e064a9454cc2af82ecf300034233c63
116 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The file is a PDF identified as malicious by ClamAV and an ML classifier, indicating it contains an exploit. The presence of an embedded script payload and an embedded file suggests it is designed to download and execute a second-stage payload. The specific exploit and payload are not detailed in the provided evidence, leading to an unknown family classification.

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 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 script payload in PDF stream low 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 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
021f606547e0fbf483656c3b1595e04c5091156d49c6dfed3d6454f7107697ed
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11273 bytes