Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f0e56634ad3e769…

MALICIOUS

PDF

5.4 KB Created: 2004-05-02 19:56:00 Authoring application: e First seen: 2026-05-08
MD5: 4ede959d0407dca071f811cac8637f53 SHA-1: 78302b9e1e9144baab904bae4c3325af07070e96 SHA-256: 8f0e56634ad3e769dc080bfacff919f29353704c276fa55c87644ff5efa819a7
74 Risk Score

Malware Insights

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

The PDF file contains an embedded JavaScript file, indicated by the PDF_EMBEDDED_SCRIPT_PAYLOAD heuristic. This embedded script is the primary indicator of malicious activity. While the script content itself was not provided for analysis, its presence strongly suggests it's designed to download and execute a second-stage payload. The PDF_EMBEDDED heuristic also points to the presence of an embedded object, further supporting this delivery mechanism. The file's metadata indicates it was authored by 'e', which is not a typical user application.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • PDF embedded file could not be fully decoded medium PDF_EMBEDDED_FILE_UNDECODED
    A declared PDF /EmbeddedFile stream uses filters that the scanner could not decode. The raw stream was carved for artifact triage because malformed or unsupported attachment filters can hide payload content from normal extraction.
  • 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
  • Embedded script payload in PDF stream info 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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/xfa-template/2.5/In PDF document text
    • http://www.xfa.org/schema/xfa-data/1.0/In PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00000342.js decompressed-pdf-stream PDF FlateDecoded stream at offset 0x342 68243 bytes
SHA-256: a44a512e92c5abbd86e7da4e3b83fa5be618e8ab9f4dd1130dcd3aa3c286f121

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