Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bcf3111d9ab3f04…

MALICIOUS

PDF

11.7 KB
MD5: d08325e2cc3aedd26161e962a14686dc SHA-1: 2395555d9c6554d4a72623e98bf15ab10a0c18e3 SHA-256: 2bcf3111d9ab3f0422c425486f9b7daeaac4bd72794655d34ac56972c00a774a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The file is identified as a malicious PDF by multiple high-confidence heuristics, including ML classification and ClamAV detection (Pdf.Exploit.Dropped-78). The presence of an embedded script payload and an embedded file suggests the PDF is designed to exploit vulnerabilities or trick the user into executing malicious content. The embedded URLs, while mostly benign or unknown, are part of the PDF's structure and do not indicate a specific delivery mechanism beyond being part of the document.

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
089e1fab851c4957c5dca8ee94f2918987ea6ddc4a783b58b0d91714a1914be5		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11239 bytes

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