Malicious PDF — malware analysis report

Static analysis result for SHA-256 39707101549197e2…

MALICIOUS

PDF

35.9 KB Created: 2021-07-08 01:43:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: df3bdc50b72c201b5b41fa3a5e7eec97 SHA-1: d6bd61eb615efd7d20c0e211c16ef8b89d615ced SHA-256: 39707101549197e2b0caeff087e9ea8f79a94592b9dcfcbe12d4ae84f30a7191
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-on-coin-master-link-game-hack PDF link annotation
    • http://stitqi.ac.id/website//repository/coin-master-cards_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/free-robux-pin-codes_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/how-to-robux_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/free-roblox-script-executor_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/coin-master-hack-online-2021_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/get-roebucks-com_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/roblox-free-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/what-do-roblox-points-do_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/roblox-online-free-no-download_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/how-to-hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/how-to-download-minecraft-for-free-on-windows_GM479516143.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/how-to-get-free-easy-robux-vortexx_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/will-minecraft-dungeons-be-free_GM479516143.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/como-instalar-hacks-para-roblox_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/minecraft-java-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/coin-master-35-16-hack-apk_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/how-to-get-free-skins-on-coin-master_GM406889139.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_off0000357c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x357C 23168 bytes
SHA-256: 640e024361da1d9d2514a9137c17fc369b89e7e8a637756d35caa2733cdf0732
font_01_sfnt_off000069cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69CB 18344 bytes
SHA-256: e8d74cdfafe168009f9dc4b70b31a19d6777835fd11eed0a51de0eb2e067c79b

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