Malicious PDF — malware analysis report

Static analysis result for SHA-256 048bc0877daae63c…

MALICIOUS

PDF

12.1 KB
MD5: 130208a3c317f975cc6d28ff57b58bae SHA-1: 79c9104607e35960dc0aa80d8c6f3778a5019f0d SHA-256: 048bc0877daae63ca98484d1dd2479c9437655abb3f83debd2a8e47d7f646d60
116 Risk Score

Malware Insights

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

The file is identified as malicious by multiple heuristics, including a critical ClamAV detection for 'Pdf.Exploit.Dropped-78' and a high ML classifier score. The PDF contains embedded script content and an embedded file, indicating it is designed to exploit vulnerabilities and execute a secondary payload. The benign URLs present do not detract from the malicious nature indicated by the other findings.

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
c7a63d971d422b0badf5bdad9de590d967e4ac6dabf8ed61d034cf2f3598618e
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 11595 bytes