Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7165161d8a94b2a…

MALICIOUS

PDF

48.0 KB Created: 2021-06-03 05:04:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 11d48d61ac19243bfa16a1602db566d0 SHA-1: db5c2db14e558e2e52724a16d4165177930fb7ed SHA-256: e7165161d8a94b2a08104d78aae5f878a6abc1d7b8f815a161ce5b53f9ad52b3
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.online/app/406889139/coin-master-daily-bonus-game-hack PDF link annotation
    • http://www.elibrary.perludem.org/repository/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-coin-master-credit_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-free-spins-generator-no-human-verification_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/generator-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-in-app-purchase-hack_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/daily-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/where-tiktok-free-views-apk-download_GM835599320.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/robux-in_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-hack-android-no-root_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-minecraft-for-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-hacksco_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/all-links-for-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-free-spins-link-download-hack_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-official-website_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/javascript-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000507c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x507C 27388 bytes
SHA-256: 18fdef7a8764ce25872871a5265f81a20910f83e43e3957865d48fbf8fab0ebe
font_01_sfnt_off00008f11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F11 2812 bytes
SHA-256: 869414959d7b492e0f799b560e1731e3ab498bd286c28e9f0d2ec33d9b6cf53d
font_02_sfnt_off000098b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98B0 18324 bytes
SHA-256: 49f584c02d5d185fccddb39f45d489986bed95ac7bc2f0da6bb6a0e76047048d

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