Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b5766739baf1ede…

MALICIOUS

PDF

22.1 KB Created: 2021-06-05 09:03:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 622395d1e0ca0db64d7eec9fdb2e0ac1 SHA-1: 0d8244d84af51a3748040bb6384eaebd617fffa6 SHA-256: 1b5766739baf1eded01b950781c28419d1cf00f38750977e2692d44d780b2486
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as an image-only lure, a common tactic to disguise malicious links. It contains a single embedded URL that uses a URL shortener, increasing the likelihood of it leading to a malicious site. The heuristics strongly suggest this is a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.1241

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 22 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://megerono.page.link/JVHQ In PDF document text
    • http://www.microsoft.com/typography/ctfontshttp://www.fonts.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_off00004840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4840 6180 bytes
SHA-256: 56a52b815ab1d3320d2b86f77abd9fd9ddb7ef0bf6f0425b132bd10f1381ab15

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