Malicious PDF — malware analysis report

Static analysis result for SHA-256 af13e8364151ac30…

MALICIOUS

PDF

7.9 KB First seen: 2026-05-09
MD5: fb124c3930315ad1d75075f319099b80 SHA-1: 56f44fa59cb1e0d392b69f7c23be6ff4a364cb59 SHA-256: af13e8364151ac306d5ad52f0987dcdfedcfaba159842202011a815d987688fa
68 Risk Score

Malware Insights

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

The PDF file was flagged by an ML classifier as malicious. Static analysis revealed an embedded file and an AcroForm button with an action trigger, which are common techniques for delivering malicious payloads. The presence of these elements, combined with the ML score, indicates a high likelihood of malicious intent, potentially for malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6376

Heuristics 4

  • 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
  • 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://ns.adobe.com/xdp/ In PDF document text
    • http://www.xfa.org/schema/xci/1.0/In PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0041.bin pdf-embedded-file PDF EmbeddedFile object 41 at offset 0xE68 85 bytes
SHA-256: c06dcd026a7ea0536b63e07ce688691b585339a3ab7ff59065e546b56308c7bb
embedded_file_obj0042.bin pdf-embedded-file PDF EmbeddedFile object 42 at offset 0xF1A 1029 bytes
SHA-256: dda0835df994b8be920f715db36452f6cee7bb42bbc9c897f878a7b298ba8e91
stream_006_off00001134.js decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1134 56839 bytes
SHA-256: 4fb22d675a9748acfc4713a126b3b42d1e6bb04d2ba60752ca20e05dcfa3750c

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