Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a1a0748f6b10426…

MALICIOUS

PDF

19.2 KB
MD5: 1dcf1a991d8eac4a8a1f4ac90199c63a SHA-1: 6f3ae5544e0290439d04af1de433b821cb859895 SHA-256: 9a1a0748f6b1042635b062f539053f3e9e3a794139f9d7c1babc4acd486d33e4
126 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Exploit.Dropped-78' and a high ML score. The presence of an embedded script payload and an embedded file further indicates malicious intent. The document body content is obfuscated and does not provide clear user-facing lures, suggesting the exploit is likely delivered through the embedded components.

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
518e86ef044e3083d51a616350a40f37d711f6645ad790f70c5148be5f6dcd4d
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 18902 bytes