Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b6fd034b16b61e2…

MALICIOUS

PDF

34.0 KB Created: 2021-06-25 02:10:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d2d0cd7ee7b8dc108e92bd216ea2d310 SHA-1: 5ae1f4f920589ea7d950735232f23cb44a03de30 SHA-256: 4b6fd034b16b61e2b80d1c425065e10afb5d0cd75092a85d5428c456aa07a903
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and lures users with promises of free game currency or hacks. The primary malicious link is http://netcdn.co/app/431946152/robux-hack-sex-game-hack, which is associated with a game hack generator lure. The document's structure and embedded URLs suggest it is designed to lead the user to potentially malicious websites, likely for further exploitation or credential harvesting.

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/robux-hack-sex-game-hack In PDF document text
    • http://lkp.cz/FRONTEND/IMG/PICTURES/files/how-can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://lkp.cz/FRONTEND/IMG/PICTURES/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://lkp.cz/FRONTEND/IMG/PICTURES/files/free-robux-app_GM431946152.pdfIn PDF document text
    • http://lkp.cz/FRONTEND/IMG/PICTURES/files/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
    • http://lkp.cz/FRONTEND/IMG/PICTURES/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lkp.cz/FRONTEND/IMG/PICTURES/files/inappropriate-roblox-games-2021_GM431946152.pdfIn PDF document text
    • http://lkp.cz/FRONTEND/IMG/PICTURES/files/roblox-free-pants_GM431946152.pdfIn PDF document text
    • http://lkp.cz/FRONTEND/IMG/PICTURES/files/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • http://lkp.cz/FRONTEND/IMG/PICTURES/files/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lkp.cz/FRONTEND/IMG/PICTURES/files/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://lkp.cz/FRONTEND/IMG/PICTURES/files/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
    • http://lkp.cz/FRONTEND/IMG/PICTURES/files/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://lkp.cz/FRONTEND/IMG/PICTURES/files/roblox-free-gift-card-org_GM431946152.pdfIn PDF document text
    • http://lkp.cz/FRONTEND/IMG/PICTURES/files/coin-master-hack-apk-with-fb-login_GM406889139.pdfIn PDF document text
    • http://lkp.cz/FRONTEND/IMG/PICTURES/files/free-robux-roblox-game-image_GM431946152.pdfIn PDF document text
    • http://lkp.cz/FRONTEND/IMG/PICTURES/files/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lkp.cz/FRONTEND/IMG/PICTURES/files/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://lkp.cz/FRONTEND/IMG/PICTURES/files/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • http://lkp.cz/FRONTEND/IMG/PICTURES/files/minecraft-mods-download-free_GM479516143.pdfIn PDF document text
    • http://lkp.cz/FRONTEND/IMG/PICTURES/files/free-roblox-hacker-com-robucks_GM431946152.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_off00002d8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D8A 22916 bytes
SHA-256: 95fb9f787e05682294038526a83b7b6a556a3040d34dbdef5ce696784216bf68
font_01_sfnt_off000060a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60A2 18724 bytes
SHA-256: 52d6fe317090ea2798e829a1009981d7e647e8c51af69a3edb7a34d7b98f6ca7

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