Malicious PDF — malware analysis report

Static analysis result for SHA-256 68f2be4b9bc13576…

MALICIOUS

PDF

10.4 KB
MD5: 843b1c3ede656716260827c500397e8f SHA-1: 4272a640159b41cf36d51a569eaa94c9bad1c8ac SHA-256: 68f2be4b9bc13576385b2f53488fd570e4239d5a22391522041d53cf5c022a52
110 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including ClamAV's Heuristics.PDF.ObfuscatedNameObject and a machine learning classifier, indicating malicious intent. It contains an embedded file and uses XFA forms, suggesting an exploit targeting PDF rendering or form processing. The embedded file is likely a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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
752c71c52d49acadd828107f6e0b287ba13ce6ea032cde58ac17d68a971716b8		 pdf-embedded-file PDF EmbeddedFile object 1 at offset 0x76 13408 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).

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