Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8ceb5ffe84f765d…

MALICIOUS

PDF

35.8 KB Created: 2021-07-05 02:35:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 6294ce2146e65670b37981947693f738 SHA-1: 744c4a81062611e59bae329ab089e450e40af3d3 SHA-256: d8ceb5ffe84f765de931bd6a0a98ea1cfdf5c47729f749ebda80f36f87db0ee3
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a high-confidence heuristic indicating it links to a game hack lure. The embedded URL, http://netcdn.tw/app/406889139/no-human-verification-coin-master-hack-game-hack, is presented as a 'no human verification' tool for game cheats. This suggests the document's primary purpose is to trick users into visiting a potentially malicious site, likely for further exploitation or to deliver malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/no-human-verification-coin-master-hack-game-hack PDF link annotation
    • http://www.stttekstil.ac.id/elib/repository/coin-master-heaven-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/get-free-hero-animation-roblox_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/serveur-roblox-avec-admin-free_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-to-get-free-robux-hack-ipad_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/village-4-coin-master_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-1k-robux_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/coin-master-free-link-app_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/minecraft-hacked-client-bedrock_GM479516143.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-to-be-admin-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-free-hair-boy_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/coin-master-hack-tool-v1-9-download-free-pc_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-robux-no-download_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/minecraft-pocket-edition-free-apk_GM479516143.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-xbox-gameachivements-roblox_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-avatar-girl_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/coin-master-hack-online_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-robux-glitch-on-ipad_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/shooting-roblox-free-too-play-on-line_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_off0000338e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x338E 23448 bytes
SHA-256: 2924e6b7c0d66e4d907e5081fb8daab0592dd6cda3dcc5b884153f64c9557e82
font_01_sfnt_off000068a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68A9 18540 bytes
SHA-256: e5568bb039e3c205aa2137145a248ebc71eafd019c47bb595c69fd3e49d5c426

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