Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5a3d09e065d5b7b…

MALICIOUS

PDF

55.0 KB Created: 2021-05-26 10:40:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: f9fb856b5f52069d7d99219ce63d23c3 SHA-1: f2452e0df253311219cfe0c6dd2bb13e5fcd3410 SHA-256: d5a3d09e065d5b7b779a23f45c323a3afe3cf1622c9782388a765fa0c7aa1b96
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was identified as an image-only lure, a common tactic in phishing campaigns to trick users into clicking malicious links. The embedded URL, 'https://emuskone.page.link/KRHL', redirects through a URL shortener, further obscuring the final destination. While the URL itself is benign, the pattern strongly suggests a phishing attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.0202

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 55 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/KRHL In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bca4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCA4 16072 bytes
SHA-256: b5bf9e281f30950d314dbef12af57a0ca580c887186590adc4ad5b6547f98b96

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