Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c2a2b20d677c5f1…

MALICIOUS

PDF

11.9 KB
MD5: a36c681db60258a160b878ca98235878 SHA-1: e0a001c7f50ed49b83b7131f254725051bcc3d47 SHA-256: 4c2a2b20d677c5f12eaf9b5d27480f2f3a837d414808ed51624e10ac1bb12c64
126 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious Attachment T1566.002 Phishing: Spearphishing Attachment

The file is identified as a malicious PDF by ClamAV and an ML classifier, indicating it likely exploits a vulnerability. The presence of an embedded script payload and an embedded file further supports this. The embedded URLs are benign or unknown, but the overall structure points to a malicious PDF dropper.

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
200dd6624412d6bcd91b67c71aa5c5a87cc4bfbdc781a94a938f010543f1b343
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11409 bytes