Malicious PDF — malware analysis report

Static analysis result for SHA-256 52dea8d4ce4c9dd1…

MALICIOUS

PDF

14.2 KB
MD5: 323adf0f4d153e4dca54a6543e3e9f1b SHA-1: 4f7a506bbd198814b9cd3f0f80010eda38a7f13b SHA-256: 52dea8d4ce4c9dd10b3cd9d3cca903f85b57a8586a74ee9310066f3a508a77be
114 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate this PDF is malicious, specifically flagging it as an exploit. The presence of embedded files and an XFA form further supports this, suggesting it's designed to exploit PDF reader vulnerabilities. The embedded URL is likely part of the exploit chain.

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 0x2AE7 85 bytes
embedded_file_obj0042.bin
dda0835df994b8be920f715db36452f6cee7bb42bbc9c897f878a7b298ba8e91		 pdf-embedded-file PDF EmbeddedFile object 42 at offset 0x2B99 1029 bytes
embedded_file_obj0043.bin
d7b1078c871b5402d0a1bed7271ae0b15e8240f45cfc731f390a1abe670415be		 pdf-embedded-file PDF EmbeddedFile object 43 at offset 0x2DB2 1950 bytes
embedded_file_obj0044.bin
3dd68f00f4fcb366a2a3a17c65cb2626eeddf5ea5713302d374310561d810169		 pdf-embedded-file PDF EmbeddedFile object 44 at offset 0x3248 144 bytes
embedded_file_obj0045.bin
10c03f88a5f0a0833dc5b2c8ac295b3a3c6f65e23889eb8cc1dc6fe29bf7f275		 pdf-embedded-file PDF EmbeddedFile object 45 at offset 0x32F4 77 bytes

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