Malicious PDF — malware analysis report

Static analysis result for SHA-256 56c5405947a042ed…

MALICIOUS

PDF

42.6 KB
MD5: 6ae6700901ec8139cd038c192a0b09c8 SHA-1: a20d3946d3a0e1ee435f05b1f9acf88aa97f978c SHA-256: 56c5405947a042ed27fe82437b2dd1157a546c27a53270b9ac45f7265da08be9
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_EMBEDDED_SCRIPT_PAYLOAD heuristic further suggests the presence of malicious script content within the PDF stream, likely used to deliver the exploit. The embedded file artifact also points to 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
bb4be95e15c748e37104049c2bad0c9c52ead3bfd65432f199f0f2e558a433f8		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42833 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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