Malicious PDF — malware analysis report

Static analysis result for SHA-256 10ebf5714ad55702…

MALICIOUS

PDF

10.4 KB
MD5: cc1dfaf84689cdcd0f642ca2d5e895e4 SHA-1: d41cbd2efd3c8fb61b615666af9182f0a357598a SHA-256: 10ebf5714ad55702b176176d3c662e4da69a09afffc2db9af03db71083093f3b
110 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically noting obfuscated objects and an embedded file. The presence of XFA forms and embedded files suggests an attempt to execute code or load additional malicious content. While no specific script was extracted, the nature of the detections points towards a malicious document designed to exploit vulnerabilities or act as a dropper.

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
dd09980941a077d6d3b6199b7d83ec77490501987d885a3bddb6bfde60262723		 pdf-embedded-file PDF EmbeddedFile object 1 at offset 0x74 13408 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).

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