Pdf.Dropper.Agent-7134869-0 — PDF malware analysis

Static analysis result for SHA-256 ca405a7b01d2df40…

MALICIOUS

PDF

18.6 KB First seen: 2021-10-23
MD5: c558c00428d3d0ea3a7997fa8940a58a SHA-1: 795bc76a3627e4479e4668b3e276789bd4ec6864 SHA-256: ca405a7b01d2df401fe13ee53dffcbca0fc484bc6698c1619e2653df69ddf731
112 Risk Score

Malware Insights

Pdf.Dropper.Agent-7134869-0 · confidence 95%

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded script content and is flagged by multiple heuristics, including ML and ClamAV, as a malicious dropper. The embedded file artifact suggests it is designed to deliver a secondary payload. The presence of XFA forms and embedded scripts points towards T1059.007 (JavaScript) as the execution method, and the overall nature of the file suggests it was likely delivered as a spearphishing attachment (T1566.001).

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Dropper.Agent-7134869-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7134869-0
  • 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 info 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/ In PDF document text
    • http://www.xfa.org/schema/xci/1.0/In PDF document text
    • http://www.xfa.org/schema/xfa-template/2.4/In PDF document text
    • http://www.xfa.org/schema/xfa-data/1.0/In PDF document text
    • http://ns.adobe.com/xtd/In PDF document text
    • http://www.xfa.org/schema/xfa-form/2.8/In PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0005.bin pdf-embedded-file PDF EmbeddedFile object 5 at offset 0x5B 24936 bytes
SHA-256: 2962eeee5d56c16b43dccceb836253a5a8c29105ffe1a1e94a1a7bd27d54a37b
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).

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