Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b175a7f8aa397ee…

MALICIOUS

PDF

11.8 KB
MD5: 0d7cc8fb7cfbf3e5158cd9411d913981 SHA-1: 0342ee2f6a61299940a7562ed648ff91fc884855 SHA-256: 0b175a7f8aa397eee63bc0c0417efb819797327acc53bf8e8d1e6f6f2d6d4e77
118 Risk Score

Malware Insights

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

The PDF file contains embedded content and XFA forms, which are often used to deliver exploits. Static analysis detected an embedded script payload and an embedded file, strongly indicating malicious intent. The ML classifier and ClamAV detection further confirm this, flagging it as a known exploit dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • ClamAV: Pdf.Exploit.Dropped-78 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-78
  • 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
  • Embedded script payload in PDF stream low PDF_EMBEDDED_SCRIPT_PAYLOAD
    PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
  • 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/xfa-template/2.5/
    • http://www.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin
45d8ce63beede02a8b71d52d3ff97d415a0282cf352697700cae3378a63fe082		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11324 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).

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