Malicious PDF — malware analysis report

Static analysis result for SHA-256 846ff4671ee5d7e6…

MALICIOUS

PDF

11.7 KB
MD5: 5b995a2c1f6f1c5f8c3a329aa3809715 SHA-1: abce8ba484909f56edd4119e414472895e50ab95 SHA-256: 846ff4671ee5d7e61c0e031c85f5b8ca82dc6e4094e8589a87820d62d4e2db4b
98 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.002 Spearphishing Attachment

The PDF contains embedded content and a script payload, strongly indicating it's designed to deliver a secondary malicious file. ClamAV detected this as Pdf.Exploit.Dropped-78, confirming its malicious nature. The embedded file 'embedded_file_obj0008.bin' is the primary artifact of interest.

Heuristics 6

  • ClamAV: Pdf.Exploit.Dropped-78 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-78
  • 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
d20272e28de6d4e9f2e66b7703af5b9178bbdcf7ab4b1997747bcebf4e6b66fd		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11174 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).

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