Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a9c4470ef0b0a59…

MALICIOUS

PDF

42.3 KB
MD5: 536b3e39163e00e5d139d9c07abcd868 SHA-1: b6d410d6fe9aa7defc167d066c3ab56b3c551a4d SHA-256: 2a9c4470ef0b0a59239feb52407d54c1272ce442941cfe2f4feb477aee701c7b
156 Risk Score

Malware Insights

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

The critical ClamAV heuristic firings indicate this PDF file is recognized as a known exploit, specifically 'Pdf.Exploit.Agent-36830'. The presence of an embedded script payload further supports its malicious nature. The file likely attempts to exploit a vulnerability within the PDF reader to download and execute a secondary 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
bf1d9586bbb7944157e4899cd625c0223515c2fe4f83f0cf82605099aeb49a45		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42585 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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