Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea0ef80682eaf303…

MALICIOUS

PDF

42.4 KB
MD5: e8366a16a6fef17ebd60efde13afee94 SHA-1: 709566d18d8435ce9b9dcfcbf97131abef6e0577 SHA-256: ea0ef80682eaf303743b2d96b5a147758b5fe69d545a41e881e3f5e4fc4f97cd
188 Risk Score

Malware Insights

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

The file is a PDF document flagged by multiple heuristics and a machine learning classifier as malicious. It contains embedded scripts and embedded files, indicating it is likely a dropper or exploit document. ClamAV detection of 'Pdf.Exploit.Agent-36830' further confirms its malicious nature. The embedded nature and exploit detection suggest it aims to deliver a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/xci/1.0/
    • http://www.xfa.org/schema/xfa-template/2.5/
    • http://www.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin
0a2224c4023b216235b61c3fc4dd17bbfac1ab23a545687f51b97604cf654712		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xD7 46 bytes
embedded_file_obj0009.bin
b5619f45313b6afaa4e0df2aa1f28887bb93de182a09e01ae20e167e794429b8		 pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x14D 687 bytes
embedded_file_obj0010.bin
0fe7596619d7974f48bb0928a6efec8cf5bea691a6bfb71cb5fbc41c3ca73638		 pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x447 168 bytes
embedded_file_obj0011.bin
a44780b32a9317c9c4908a96e24e06fbbe21405e8b42991a679837333a489538		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x53A 433 bytes
embedded_file_obj0012.bin
d2f06f3fc6900856fe613a64a561919c8454dcbe0fdf238fb8b43e07016955ea		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x736 190 bytes
embedded_file_obj0014.bin
4baf8a6cbf6b0a44139ae12f67540489d9960dcc34009d54ef8c673b03efd527		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x841 40653 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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