Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d7851280fcbd3bd…

MALICIOUS

PDF

35.6 KB Created: 2021-07-05 12:28:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 13d252a919e799f83275e0bd76e0f289 SHA-1: 551618b0bd40e5006f5b8c9ba2356ac8e394a0a2 SHA-256: 4d7851280fcbd3bda1ff1e6acf2829f96cc9d7e57115dc5d031d6a3abd591795
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generators' or 'game hacks'. The embedded URLs and heuristic firings indicate a lure to trick users into visiting potentially harmful sites. While no scripts were extracted, the document's structure and content strongly suggest a phishing or scam attempt designed to lead users to malicious 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.tw/app/479516143/mcpe-free-download-game-hack In PDF document text
    • http://slim.sisminkada.net/repository/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/can-you-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-100-robux_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/how-to-get-2021-robux-on-roblox-free-2021_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/goku-free-cloth-roblox_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/i-was-hacked-by-liepa20212021910-on-roblox_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/hack-coin-master-using-cheat-engine_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/did-roblox-got-hack_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/google-how-do-you-get-robux_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-spin-and-win-coin-master_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-tiktok-fans_GM835599320.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/april-fools-day-2021-hack-roblox_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-robux-games_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-games-like-minecraft_GM479516143.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-coins-app-for-coin-master_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/roblox-free-rubox_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_off000034bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34BF 22840 bytes
SHA-256: d0b22e817a8725efe6e83df76a08a8c4188ed9fe58c7160f683f5d2732517e99
font_01_sfnt_off000067ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67AB 18532 bytes
SHA-256: 07bec80ec77a407731f20d425ff760d4af3993c3cbef718c37c298fbcddeff72

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