Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf29dc170dec9fb6…

MALICIOUS

PDF

42.1 KB
MD5: 7156d1a30321a3659ba6286a05f8c8c9 SHA-1: f6860a5525b219ea621b717512da27c68370524a SHA-256: bf29dc170dec9fb60f500ac305ce410e2c67a1e3242dc504370400c1a844744e
156 Risk Score

Malware Insights

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

The critical ClamAV heuristic firings, specifically 'Pdf.Exploit.Agent-36830', indicate the file is a known PDF exploit. The PDF contains embedded objects and scripts, suggesting it's designed to download and execute a second-stage payload. The embedded URL heuristic also points to potential malicious content delivery.

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
a6b6d44cbcb8b8e6178ec6a3dce15ac1c23eb7b18d55bf8cd537e6f423a5b522		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42326 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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