Malicious PDF — malware analysis report

Static analysis result for SHA-256 40353630bdf83933…

MALICIOUS

PDF

10.3 KB Authoring application: Fzlfrlaujg Uqcaktqgm
MD5: 276ec1efd38d8c0344414ac2d843e8c0 SHA-1: d9b4ceb5e9cb3b774a47f7301ad6e816dddf8ad6 SHA-256: 40353630bdf839334d8f9905cf655f64b245a4021d7d56b1f7ce6bd4a6f915fb
130 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious File T1204.002 Malicious File: User Execution

The PDF sample was flagged by multiple heuristics, including ML and ClamAV, indicating malicious content. The 'PDF_EMBEDDED_SCRIPT_PAYLOAD' and 'EXTRACTED_FILE_STATIC_TRIAGE' heuristics suggest the presence of an embedded script or payload within the PDF stream, likely responsible for the malicious behavior. The embedded URL is a potential indicator of a command and control server or download location for further stages.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • ClamAV: Pdf.Exploit.Dropped-87 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-87
  • 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
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • 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://www1.powerholderxy.de.lv/?3i8dt6fso=V8ylyLGb3tiV5djboqefoaGK2ebktmuanZmoaZusoafUndnlpaCfl5WlsKpom2mK4KmjpJ%2Bgpp3G1Mrhqba5vZ7pnM11l5qpig%3D%3D&quot
    • http://ns.adobe.com/xdp/
    • http://www.xfa.org/schema/xci/1.0/
    • http://www.xfa.org/schema/xfa-template/2.5/
    • http://ns.adobe.com/xtd/
    • http://www.xfa.org/schema/xfa-data/1.0/
    • http://ns.adobe.com/xfdf/
    • http://www.xfa.org/schema/xfa-form/2.8/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin
5a35ff4daacbb63eecb0071838ff467aba5de33d5d2b961d3149613f2d8e8fef		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0x141 9450 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 3 long base64-like blob(s).

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