Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdedd26caf9197f4…

MALICIOUS

PDF

37.7 KB Created: 2021-05-26 10:30:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: aeca0b5e07e55364a94cbd4b37a1ebbe SHA-1: e71305f39a4d121464af5ffffdee1172a1e63452 SHA-256: fdedd26caf9197f41fcbfea8d807e24f28a69312701eb3c8b76628123858c965
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as an image-based lure, containing a single image and minimal text, designed to trick users into clicking a link. The embedded URL, https://emuskone.page.link/vFZF, is a URL shortener, commonly used in phishing campaigns to obscure the final destination. The heuristic firings strongly indicate a phishing attempt, likely delivered as an attachment.

Machine Learning

  • Nyx PDF Classifier clean score 0.0774

Heuristics 3

  • Image-only PDF lure links through URL shortener high PDF_IMAGE_LURE_SHORTENER_LINK
    PDF is image-heavy with little real text and its clickable action points to a URL shortener. This is a high-confidence credential-phishing carrier shape: the visible page is a screenshot-like prompt while the destination is hidden behind redirect infrastructure.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 37 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 https://emuskone.page.link/vFZF In PDF document text
    • http://www.microsoft.com/typography/ctfontshttp://www.tiro.comMicrosoftIn PDF document text
    • http://www.microsoft.com/typography/fonts/default.aspxIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007efd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EFD 8388 bytes
SHA-256: 392843bc8b1a2b758bf2419b5ed879d22349af8c28686815ff359b67ea6b1019

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