Malicious PDF — malware analysis report

Static analysis result for SHA-256 8278a112fefb9d53…

MALICIOUS

PDF

15.4 KB
MD5: cf469fbb89104921fb2858bee24b5b49 SHA-1: eac528c7de56655e21d948008967e0f71ffb9e98 SHA-256: 8278a112fefb9d537b3f9f565d9b50d18097b2f2de3051040f92cc0d06b11b1d
68 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious File T1204.002 Malicious File: User Execution

The PDF was flagged as malicious by an ML classifier with high confidence. Static analysis revealed an embedded file and an embedded script payload, indicating the document is likely a dropper for a secondary malicious artifact. The embedded file 'embedded_file_obj0008.bin' is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • Embedded script payload in PDF stream medium 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.
  • 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/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
af1d8809135786239b903cc6b75596a8bd1d8deb5790db4900516e97b32c7cde		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 15009 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).

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