Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4388806370290c8…

MALICIOUS

PDF

33.2 KB Created: 2021-06-17 16:56:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5115409d31c6a38a26f7c16e7dd122cb SHA-1: f1c560b3aa8564bc5cd205b824efaa6e3567b3bd SHA-256: b4388806370290c8b096b3e93f9b53ef6869f8a1f4d123560423fa763b786e55
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as game hacks and generators. The heuristic firings indicate that these links are part of a known malicious redirector chain. While no scripts were explicitly extracted, the document's structure and embedded URLs suggest a phishing or scam attempt designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/roblox-world-free-to-use-game-hack In PDF document text
    • http://sellitafrica.com/media/storage/editor/files/roblox-studio-free-download_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/coin-master-35-2-hack_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/codes-for-free-sp-in-ice-cream-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/win-free-robux_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/coin-master-hack-app-android-download_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/earn-robux-today-earn-robux-today_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/minecraft-hacker-skin_GM479516143.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/coin-master-free-spin-download_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/twitter-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/minecraft-net-download-free_GM479516143.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/minecraft-free-download-2021_GM479516143.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/free-roebucks_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/coin-master-free-chest-link_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
font_00_sfnt_off00002ca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CA9 21760 bytes
SHA-256: 261f89a98eae97b880d3d5f9f3465fe863a153968ebc742aee7badb9784b514d
font_01_sfnt_off00005caf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CAF 19024 bytes
SHA-256: 1db6ca78675bf7136a7bc967ad8ef910d61f6eda1e531f033f35a952f19fa4cc

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