Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c19bf2708ef9fad…

MALICIOUS

PDF

13.3 KB
MD5: acf075928f2cd8401b0da1ac4bb14246 SHA-1: b7b16247a310527c031e590a6322051f971cb163 SHA-256: 4c19bf2708ef9fada14ad1260627ae256a0c2da91be5f87c98dd77d3759e9f5a
114 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious Link: Malicious File T1059 Command and Scripting Interpreter T1059.001 Command and Scripting Interpreter: PowerShell

The critical ClamAV detection and high ML classifier score strongly indicate malicious intent. The presence of an embedded file and an AcroForm button with an action trigger suggests an exploit is being leveraged. The embedded URL, while not directly actionable in this context, points towards a potential download mechanism. The PDF structure itself, including XFA forms and embedded files, is consistent with exploit delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Exploit.Agent-36962 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36962
  • 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
  • AcroForm button with action trigger low PDF_ACROFORM_BUTTON
    PDF contains a /Btn form field together with a SubmitForm/URI/Launch/JS trigger — this is the building block of fake 'Download' or 'Open' button overlays used in PDF phishing lures
  • 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://www.xfa.org/schema/xfa-locale-set/2.1/

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0041.bin
c06dcd026a7ea0536b63e07ce688691b585339a3ab7ff59065e546b56308c7bb		 pdf-embedded-file PDF EmbeddedFile object 41 at offset 0x27B1 85 bytes
embedded_file_obj0042.bin
dda0835df994b8be920f715db36452f6cee7bb42bbc9c897f878a7b298ba8e91		 pdf-embedded-file PDF EmbeddedFile object 42 at offset 0x2863 1029 bytes
embedded_file_obj0043.bin
ca2bacb751843d9af8db80af38fd7755052acc2dcc98e1f009f167d1d0743782		 pdf-embedded-file PDF EmbeddedFile object 43 at offset 0x2A7C 1867 bytes
embedded_file_obj0044.bin
3dd68f00f4fcb366a2a3a17c65cb2626eeddf5ea5713302d374310561d810169		 pdf-embedded-file PDF EmbeddedFile object 44 at offset 0x2ED6 144 bytes
embedded_file_obj0045.bin
10c03f88a5f0a0833dc5b2c8ac295b3a3c6f65e23889eb8cc1dc6fe29bf7f275		 pdf-embedded-file PDF EmbeddedFile object 45 at offset 0x2F82 77 bytes

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