Malicious PDF — malware analysis report

Static analysis result for SHA-256 64d96da08076f9ed…

MALICIOUS

PDF

10.4 KB
MD5: 8a677b8a6537c6c0629356973a7fe645 SHA-1: a763b45cbdf506b4a372864cdcda5de826917641 SHA-256: 64d96da08076f9ed70a486eea9d82df67466689a7ca73055f1e12a88762186ad
110 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV due to obfuscated objects and an embedded file. The presence of XFA forms and embedded files suggests an attempt to exploit client-side vulnerabilities for code execution. The embedded file, 'embedded_file_obj0001.bin', is the primary indicator of malicious activity.

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
bf001bbda02e6916bd728f7cb055d74f80cc94cd2310ff6e828eed950d25970d		 pdf-embedded-file PDF EmbeddedFile object 1 at offset 0x7A 13408 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).

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