Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b058b45704b9df6…

MALICIOUS

PDF

42.5 KB
MD5: 5ee8d4263d54ebb5af7fd0cb5cac1690 SHA-1: a18bf710847e56837c86afc39afc27ae196a3894 SHA-256: 9b058b45704b9df6130fdc60836a61ad9bf3a74196046d49372d0c0464aa5991
156 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.001 Spearphishing Attachment T1027 Obfuscated Files or Information

The critical ClamAV detection and the PDF_EMBEDDED_SCRIPT_PAYLOAD heuristic indicate that this PDF file contains and attempts to execute an embedded malicious script. The script's purpose is likely to download and execute a second-stage payload, as suggested by the embedded file artifact. The obfuscated nature of the DOC BODY content further supports the presence of malicious scripting.

Heuristics 6

  • ClamAV: Pdf.Exploit.Agent-36830 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36830
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • 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
361dce633ff621c5b202682a7f08689539c540d51f904a1de613646d1360ca8c		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42721 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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