Malicious PDF — malware analysis report

Static analysis result for SHA-256 304f02da559f50b5…

MALICIOUS

PDF

12.1 KB
MD5: d77ab282f0d2964534db276ce83f2418 SHA-1: 63e8b2d49298d190ee14f137a80a6b473a1b20c4 SHA-256: 304f02da559f50b5086d2e7f8d2aae4aaa00be31d33672706248624248f1d964
126 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by ClamAV (Pdf.Exploit.Dropped-78) and a machine learning classifier. Heuristics indicate the presence of an embedded script payload and an embedded file, suggesting it's designed to drop and execute further malware. The PDF structure and embedded content point towards an exploit delivery mechanism.

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
6970e0ae1557a91bf9004e3c43ca5e783be780e490f2c13361099fd9c0a63912
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11618 bytes