Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b433e8c74008d41…

MALICIOUS

PDF

12.0 KB
MD5: ac59292cbc3d513e6cf5e861dae6c9a7 SHA-1: 65dbee5f8468ba1d9d4089ae145a5caa5fd00598 SHA-256: 6b433e8c74008d413490c0792370243c65c3584cb563af5f91b8878a6b4b86d4
116 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV with the signature Pdf.Exploit.Dropped-78, indicating it exploits a known vulnerability. The presence of an embedded script payload and an embedded file further supports this. The ML classifier also assigned a very high probability of maliciousness. The benign URLs present are likely decoys or unrelated to the malicious functionality.

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
5ab3ad5b412b91efdc1f475ccdcc61714c8b6fc539b3d4721eed71d0204e0342
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 11520 bytes