Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c0bebba52920e5d…

MALICIOUS

PDF

17.4 KB Created: 2021-06-05 09:02:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: fd026f6aff65d752d41e40bbc4d1b988 SHA-1: 696ec5a3ddee3f7423ffe47f88c767b73e6c0fe9 SHA-256: 4c0bebba52920e5dfe1ea731f351d7cda16ab8af9f26ef61db7390c357734e30
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as an image-only lure, containing a screenshot disguised as a document with a clickable link. This link, 'https://johr.page.link/gvSo', redirects through a URL shortener, a common tactic in phishing campaigns to obscure the final destination. No scripts were extracted, but the structure strongly suggests an attempt to trick the user into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier clean score 0.0761

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 17 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://johr.page.link/gvSo 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_off00003280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3280 12396 bytes
SHA-256: 9651c78dad64c31681e27aaf77368dfa0aab65a72df78104afb2fc8edab34c59

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