Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e6a40693d584e9c…

MALICIOUS

PDF

14.4 KB
MD5: 9b6abc49c02fbf56d85d95a321853897 SHA-1: 5d97aed84b53018824b577624aefc5fc711121f5 SHA-256: 4e6a40693d584e9cc84cf83a92bde376fbf646042f9f009387493fdb6ff9d3a2
114 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as Pdf.Exploit.Agent-36962 and a machine learning classifier with high confidence. It contains embedded files and an XFA form, indicating it is likely designed to exploit a PDF vulnerability for payload delivery. The presence of an embedded URL, though not directly malicious in reputation, is suspicious in this context.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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 0x2C00 85 bytes
embedded_file_obj0042.bin
dda0835df994b8be920f715db36452f6cee7bb42bbc9c897f878a7b298ba8e91		 pdf-embedded-file PDF EmbeddedFile object 42 at offset 0x2CB2 1029 bytes
embedded_file_obj0043.bin
6f03c72de447e14766f0014f62267fed96f7ac22c54c485ead75824526a05793		 pdf-embedded-file PDF EmbeddedFile object 43 at offset 0x2ECB 1837 bytes
embedded_file_obj0044.bin
3dd68f00f4fcb366a2a3a17c65cb2626eeddf5ea5713302d374310561d810169		 pdf-embedded-file PDF EmbeddedFile object 44 at offset 0x331F 144 bytes
embedded_file_obj0045.bin
10c03f88a5f0a0833dc5b2c8ac295b3a3c6f65e23889eb8cc1dc6fe29bf7f275		 pdf-embedded-file PDF EmbeddedFile object 45 at offset 0x33CB 77 bytes

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