Malicious PDF — malware analysis report

Static analysis result for SHA-256 c20ae64f579009ab…

MALICIOUS

PDF

19.5 KB Created: 2021-05-28 10:46:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 0345948f4343beb20e25bd6c3be1454c SHA-1: 6b8166f6b6ae74928722ccf08c9f5d24c6495330 SHA-256: c20ae64f579009ab0b222ebc24757b8c278fb151363b253b87079f352a58978b
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is an image-only lure, typical of phishing attacks designed to trick users into clicking a link. The embedded URL, https://znakudachi.page.link/r5qx, is a URL shortener, which is often used to obscure the final destination. The heuristic firings strongly indicate a phishing attempt using a visual lure.

Machine Learning

  • Nyx PDF Classifier clean score 0.0873

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 19 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 http://www.microsoft.comhttp://www.microsoft.com/typography/Microsoft In PDF document text
    • https://znakudachi.page.link/r5qxIn PDF document text
    • http://www.microsoft.com/typography/fonts/In PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003ae9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3AE9 6016 bytes
SHA-256: e84d2cc3dc04da7d88ca48e49e6a93fc3f7447262f733372844883021fbed657

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