Malicious PDF — malware analysis report

Static analysis result for SHA-256 41ffd5e404cdfce9…

MALICIOUS

PDF

50.6 KB Created: 2021-05-19 16:46:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0a0ac24da3be5fa864e9bf90dd12b562 SHA-1: 2e9867b105da4dbd953cc98367078cdc277687bf SHA-256: 41ffd5e404cdfce9bb77117c6d1a10bd4f6867cd4590b8b67d47b344132a985f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious redirector links and a lure for game hacks, specifically targeting Coin Master. The document body and embedded URLs point to a scam designed to trick users into visiting malicious websites. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to deliver a payload or redirect to a malicious site, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8594

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/406889139/daily-free-spins-on-coin-master-game-hack In PDF document text
    • http://schoolsupportandbeyond.org/images/free-spin-generator-for-coin-master_GM406889139.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/coin-master-free-spins-links-app_GM406889139.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/minecraft-hack-2021_GM479516143.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/level-coin_GM406889139.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/is-coin-master-free_GM406889139.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/coin-master-game-hunter_GM406889139.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/hack-coin-master-using-cheat-engine_GM406889139.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/inappropriate-roblox-games-2021_GM431946152.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/coin-master-free-codes_GM406889139.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/free-vip-server-roblox_GM431946152.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/roblox-sign-in-free_GM431946152.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/coin-master-generator-hack_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049a7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49A7 25488 bytes
SHA-256: cb5f7eab32af4901e3ffc99ce13876ac13aee1a4fb081dbb826202cbee4e7d37
font_01_sfnt_off0000838d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x838D 3204 bytes
SHA-256: 8c2546387700f45186c395d475006178ee984eabbc175bcf1ee6eb58ba8b57aa
font_02_sfnt_off00008e8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E8C 8676 bytes
SHA-256: e06aca5f85e50ae6cefda302c5299c18ab6d27c174f74f0bb0ee8efa7ccb4468
font_03_sfnt_off0000a316.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA316 18308 bytes
SHA-256: 1bc93d0bdf7bcc9dde046a772a1d5e318036c000a48b0748ebe0e6d1e12db192

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