Malicious PDF — malware analysis report

Static analysis result for SHA-256 eef4b7d25d9086b8…

MALICIOUS

PDF

13.3 KB
MD5: c321e9c22116265625ecd69943a08db8 SHA-1: 09550877422cae4d6c63d8e540ace0c0da66890d SHA-256: eef4b7d25d9086b8e0c8a311526b2e54e3d96231695b0461562481e86a9e4f2c
66 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious File T1566.002 Phishing: Spearphishing Attachment

The PDF sample was flagged as malicious by an ML classifier with a high confidence score. Static analysis revealed an embedded script payload and an embedded file, indicating an attempt to deliver a secondary malicious artifact. The presence of XFA form elements also suggests a potential avenue for exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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
  • 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
0f53ccd5d49f06aaac53668985fb3a3b432587da342cdc263ac10185048769ac		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 12921 bytes

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