Malicious PDF — malware analysis report

Static analysis result for SHA-256 e871090630e8764b…

MALICIOUS

PDF

34.6 KB Created: 2021-07-05 02:54:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: a90c51cf8a6cf4c05004c38391233204 SHA-1: 45695ba366badca454d0c1459b9ce6591042d08d SHA-256: e871090630e8764b2082b459bbad1e438edfe6a0b477f889ee568e343983f4c3
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 0.9980

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/free-spins-and-coins-coin-master-link-2021-game-hack PDF link annotation
    • http://library.gkigadingserpong.org/repository/vehicle-simulator-roblox-cheat-scripts_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-apk-hack-download_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-hack-apk-app_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/best-cheat-engine-for-roblox_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-hack-counter-blox-roblox-offensive_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-mod_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/shark-bite-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/mcpe-hack-client_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/official-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/hack-roblox-download_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-executor-free-download_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/can-you-really-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/hawt-sauce-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-views-on-tiktok_GM835599320.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_off00003107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3107 22152 bytes
SHA-256: bf316918be5355f4da6c841936d3e5a02d2663f4e4a19401c1c7a1a14dc17dac
font_01_sfnt_off0000625d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x625D 18920 bytes
SHA-256: 5b05993ede3d068a252170bf24ec7179ee82391d529482f4f4e71e9ee81fed65

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