Malicious PDF — malware analysis report

Static analysis result for SHA-256 5155b7f0062762e1…

MALICIOUS

PDF

36.9 KB Created: 2021-05-21 20:02:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 260fb28b80f60cd66771af21889dcff2 SHA-1: b3468a175878235c2195baf628d77fd3e2efd07c SHA-256: 5155b7f0062762e139119c50ef6cd7a388780a3fc529afcc0fcadc1d677dec0d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs and a prominent call-to-action button, masquerading as a 'Minecraft Free Download Mac' lure. Several heuristics indicate that these links lead to malicious redirectors, likely designed to deliver unwanted software or further malicious payloads. No scripts were extracted, but the document's structure and embedded links strongly suggest a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://netcdn.xyz/app/479516143/minecraft-free-download-mac-game-hack In PDF document text
    • http://ruksnaitis.com/images/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://ruksnaitis.com/images/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://ruksnaitis.com/images/what-is-robux-in-roblox_GM431946152.pdfIn PDF document text
    • http://ruksnaitis.com/images/free-coin-master-game_GM406889139.pdfIn PDF document text
    • http://ruksnaitis.com/images/online-coin-master-free-spin-app_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000035ab.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x35AB 25120 bytes
SHA-256: dff97f40cd4b122ad36a434bc5bec7c2ca63111129e10b335908fb008e0ac709
font_01_sfnt_off00006f1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F1B 18292 bytes
SHA-256: eff5919d985126b8591bb7cd3dea6a103dcf6f67049ada279646be2986fdbf31

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