Malicious PDF — malware analysis report

Static analysis result for SHA-256 82cb8df8ab6482b6…

MALICIOUS

PDF

42.9 KB Created: 2021-05-10 17:32:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 01055abd61046af098e2962ebd1db302 SHA-1: eb468cbed66f378a86c157ff69c9a44ed58362de SHA-256: 82cb8df8ab6482b655368cb5425bbeeb9e7bff9afda99bcf5458da726f77b8a6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free generators'. The ML classifier strongly indicated maliciousness, and the document body reinforces the lure by mentioning 'Coin Master Hack Without Human Verification 2021'. While no scripts were directly extracted, the PDF structure and embedded URLs suggest a phishing or scam attempt designed to lead users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/coin-master-hack-without-human-verification-2021-game-hack In PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/minecraft-the-complete-handbook-collection_GM479516143.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/free-robux-offers_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/village-coin_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/simplysarc_GM479516143.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/minecraft-free-install_GM479516143.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/how-to-get-robux_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/coin-master-hack-apk-download-latest-version_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/coin-master-hack-tool-ios_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/free-spins-and-coins-from-coin-master-game_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/get-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/roblox-accounts-for-sale-free_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/how-to-add-mods-to-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/how-to-o-get-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/hack-coin-master-site-rssingcom_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/coin-master-links-for-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/blox-rewards_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/free-robux-that-actually-works-2021_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
stream_003_off00004cf8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CF8 23888 bytes
SHA-256: 0b6a784f637eecaddb85d70ceecab435659b41e7bf9b2c35adafc3edce282ad4
font_01_sfnt_off00008343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8343 19016 bytes
SHA-256: 9d151cd353acbc916f7f6eb107110adb70143b0a6a415e6841dd022ecfd31ccb

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