Malicious PDF — malware analysis report

Static analysis result for SHA-256 163e6b71e9d63678…

MALICIOUS

PDF

2.0 KB
MD5: e7f42b0274e574e2263adce4f203f2a5 SHA-1: f63438d14f7d0d367267c4b478609bcdda8b9ae7 SHA-256: 163e6b71e9d6367897d772b14fdf6c1e31568a603017ec3c1b1553e3b527e138
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 a critical ClamAV detection for 'Pdf.Exploit.Agent-23536' and an ML classifier indicating high maliciousness. The presence of an embedded file and XFA form suggests an exploit is likely being used to execute arbitrary code. The embedded file 'embedded_file_obj0001.bin' is the primary artifact of interest for further analysis.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • ClamAV: Pdf.Exploit.Agent-23536 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-23536
  • 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
7042f5b052d3532828fcd41f4ed658b5524782e40912b8d90297795f791c4e51		 pdf-embedded-file PDF EmbeddedFile object 1 at offset 0x51 13387 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).

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