Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4a281754f2dcda3…

MALICIOUS

PDF

42.2 KB
MD5: 73b04f06e88170862813f0998fa6febd SHA-1: 94d6a9ba77f785a9526b2106920964658b0b63cd SHA-256: d4a281754f2dcda3b89e763fb18343825c87f7b3a11a6aee52408a0078c70700
156 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.001 Spearphishing Attachment

The PDF file contains embedded script payloads and is detected by ClamAV as Pdf.Exploit.Agent-36830. This indicates the file is designed to exploit a vulnerability within PDF viewers to execute malicious code. The embedded script is likely responsible for downloading and executing a second-stage payload.

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
4a6762ab9ea677840ff33481837db98a2db2bbc60d895f7ccf88ae803e514621		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42454 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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