Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ad4dd8fedb30283…

MALICIOUS

PDF

10.4 KB
MD5: fe489855ca781fbcbb72a9adab205b6d SHA-1: b86a19060dba9b578eb80e6903aa94bc82019814 SHA-256: 6ad4dd8fedb30283326636474799e41f8e8dc312e875943482b67cd0a49fa40e
110 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF was flagged by multiple heuristics, including ML classification and ClamAV, indicating malicious intent. The presence of an embedded file and XFA form suggests the document is designed to execute code or download further malicious content. While no specific URLs were flagged as malicious, the embedded file itself is a primary indicator of a potential dropper or exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
  • 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://ns.adobe.com/xdp/
    • http://www.xfa.org/schema/xci/1.0/
    • http://www.xfa.org/schema/xfa-template/2.4/
    • http://www.xfa.org/schema/xfa-data/1.0/
    • http://ns.adobe.com/xtd/
    • http://www.xfa.org/schema/xfa-form/2.8/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0001.bin
ef2b351c9634c53885bad0081cfacaf81ad56f2dca01719a990156dd8e434657		 pdf-embedded-file PDF EmbeddedFile object 1 at offset 0x86 13408 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).

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