Malicious PDF — malware analysis report

Static analysis result for SHA-256 70c78249f05d9408…

MALICIOUS

PDF

5.2 KB First seen: 2026-05-08
MD5: 6cc4128074fe3ed8bc3af9443a332a36 SHA-1: 61c073047bf40dc8490723abcd1968085a1f95a4 SHA-256: 70c78249f05d940886db2f5f74992ea41d0f08a188bd518db8b36dcd2025dc15
68 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, flagged by heuristics as a malicious script payload. This script is likely designed to exploit a vulnerability within the PDF viewer to execute arbitrary code. The presence of embedded files and an AcroForm button further suggests a malicious intent, potentially for delivering a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6456

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 0xE61 85 bytes
SHA-256: c06dcd026a7ea0536b63e07ce688691b585339a3ab7ff59065e546b56308c7bb
embedded_file_obj0042.bin pdf-embedded-file PDF EmbeddedFile object 42 at offset 0xF13 1029 bytes
SHA-256: dda0835df994b8be920f715db36452f6cee7bb42bbc9c897f878a7b298ba8e91
stream_006_off0000112d.js decompressed-pdf-stream PDF FlateDecoded stream at offset 0x112D 5559 bytes
SHA-256: 6b6f4381fb1fee3a68dcf5bff06c6fd38b5c2f1586ce768f0ade9a8bd8ad307b

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