Malicious PDF — malware analysis report

Static analysis result for SHA-256 229ba5ce6101dce2…

MALICIOUS

PDF

9.3 KB
MD5: ba18b5bbf275b74e17549643805b6f5e SHA-1: aaf417fa2bf710af0fbe02c6bdc60048a583394c SHA-256: 229ba5ce6101dce207c5b691255a4dbda29ed2bfba923d4d54be6476f81d3cc1
74 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ML classifiers as malicious. It contains an embedded script payload and an embedded file, indicating it's designed to deliver a secondary exploit or malware. The presence of an embedded URL further supports the delivery mechanism. The exact nature of the embedded script payload could not be determined due to its obfuscation, but the overall pattern suggests a malicious document intended for exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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
  • 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 0xCF3 85 bytes
embedded_file_obj0042.bin
dda0835df994b8be920f715db36452f6cee7bb42bbc9c897f878a7b298ba8e91		 pdf-embedded-file PDF EmbeddedFile object 42 at offset 0xDA5 1029 bytes
embedded_file_obj0111.bin
45d049337cf40ca1da55f66eea7ad34e78f0333d8f7e5c310230beb31848bbaa		 pdf-embedded-file PDF EmbeddedFile object 111 at offset 0xFBF 58982 bytes
embedded_file_obj0044.bin
3dd68f00f4fcb366a2a3a17c65cb2626eeddf5ea5713302d374310561d810169		 pdf-embedded-file PDF EmbeddedFile object 44 at offset 0x1FB3 144 bytes
embedded_file_obj0045.bin
10c03f88a5f0a0833dc5b2c8ac295b3a3c6f65e23889eb8cc1dc6fe29bf7f275		 pdf-embedded-file PDF EmbeddedFile object 45 at offset 0x2060 77 bytes

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