Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dff8bc1e6e7ad8a…

MALICIOUS

PDF

53.4 KB Created: 2021-05-26 10:36:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: e16449cd49c8ff7398aaa032666f075c SHA-1: 4e957628d47e3597cdc774022d7c39070b9bf642 SHA-256: 1dff8bc1e6e7ad8aaef929cfca47006ffa1e5134962f1210f246a4ab60d90eba
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as an image-only lure, typical of phishing attempts, which redirects users through a URL shortener. While no scripts were directly extracted, the PDF structure and heuristic firings suggest an intent to trick the user into visiting a potentially malicious link. The presence of a URL shortener indicates an attempt to obscure the final destination, likely a payload download or further phishing page.

Machine Learning

  • Nyx PDF Classifier clean score 0.1279

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 53 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://emuske.page.link/X1Hk 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_off0000bc40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC40 14252 bytes
SHA-256: d770b6497c599eb449116818fe8bbe322729de33cf5151fa4e9f3bb6441b6d35

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