Malicious PDF — malware analysis report

Static analysis result for SHA-256 260f1c5282d22a01…

MALICIOUS

PDF

11.2 KB
MD5: aaf5e8b63a079580337e6a84ca456728 SHA-1: 7f3165e8c78d08c78c5a33b536f8c86faec18a45 SHA-256: 260f1c5282d22a018f1514651525e941fc8d41389233f63e4156a6f5fe9e95be
94 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF sample contains a high-severity heuristic firing for 'PDF_XFA_SCRIPT', indicating the presence of risky executable script within an XFA form. This script is likely responsible for exploiting a vulnerability to download and execute additional malicious content. The ML classifier also strongly flagged this PDF as malicious. While no specific family is identified, the attack pattern suggests a downloader or dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • XFA form contains risky executable script high CVE related PDF_XFA_SCRIPT
    PDF embeds an XFA form whose script block contains exploit, submission/launch, or shell-execution primitives. Ordinary LiveCycle print/update scripts are left as generic XFA/JS signals unless stronger behavior is present.
  • 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 0xEBB 85 bytes
embedded_file_obj0042.bin
dda0835df994b8be920f715db36452f6cee7bb42bbc9c897f878a7b298ba8e91		 pdf-embedded-file PDF EmbeddedFile object 42 at offset 0xF6D 1029 bytes
embedded_file_obj99999.bin
2ae986806bdcaf14674a21a58d875a19185eda2bcbdbe66514ee11cd13671480		 pdf-embedded-file PDF EmbeddedFile object 99999 at offset 0x1189 31107 bytes
embedded_file_obj0044.bin
3dd68f00f4fcb366a2a3a17c65cb2626eeddf5ea5713302d374310561d810169		 pdf-embedded-file PDF EmbeddedFile object 44 at offset 0x2739 144 bytes
embedded_file_obj0045.bin
10c03f88a5f0a0833dc5b2c8ac295b3a3c6f65e23889eb8cc1dc6fe29bf7f275		 pdf-embedded-file PDF EmbeddedFile object 45 at offset 0x27E6 77 bytes

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