Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a8fa4d98d5d9ce3…

MALICIOUS

PDF

55.5 KB Created: 2021-05-26 10:26:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: af69128778c2d9731320e16652798ed8 SHA-1: fb26d7474b9f354e73bb11d3f09e94a4cdcc97a4 SHA-256: 0a8fa4d98d5d9ce3a2866c8061e2557ab0ee7d9f839f96aa4e225b72f22b7aa0
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file is identified as an image-only lure, typical for phishing attacks. It contains a clickable link disguised within the document, which redirects to a URL shortener. This suggests an attempt to trick the user into visiting a potentially malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier clean score 0.0042

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://newselonm.page.link/E51A In PDF document text
    • http://www.microsoft.com/typography/fonts/In PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bc9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC9B 7112 bytes
SHA-256: 6fb5c64e7c950c75551915c47c64de0b36ef5b03bb553f1c55f0cd1a7fdabc63
font_01_sfnt_off0000d042.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD042 5540 bytes
SHA-256: e1228e20a47617975caa86feef1059141edb385db7a020b8c6dc71806a691822

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