Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b464ceb8083b0f9…

MALICIOUS

PDF

45.9 KB Created: 2021-06-03 18:10:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 03186718cd005180c69b2da341a384cf SHA-1: 11d6e1cc5062c3d057c15c5beeea6cdcc9b59155 SHA-256: 8b464ceb8083b0f9e8cef773706acb699cbe2346373fcb65e9f86df9941dfd72
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 0.9797

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/479516143/minecraft-fly-hack-game-hack PDF link annotation
    • http://library.gkigadingserpong.org/repository/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-link-daily-get-free-spins-amp_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/hack-a-game_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/tiktok-followers-generator-free_GM835599320.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/hackear-juego-coin-master_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-spins-daily-2021_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-tiktok-app_GM835599320.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/krnl-download_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/easy-roblox-today_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/do-you-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/flame-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/minecraft-free-online_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/claim-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_off00005176.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5176 24324 bytes
SHA-256: fc12a07fbfd04900398e06d7c9b2e72eb34bd8f770ecb4bd0d19b295de83fdb2
font_01_sfnt_off000087d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87D8 2820 bytes
SHA-256: e5f6ec650849eefe6bc6a1649c2875ce35328d23e4196945bba66cc43e5a49d4
font_02_sfnt_off00009177.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9177 17992 bytes
SHA-256: 06651707645ad1f4ebda8b3f746ca430a0b9618d46277a77061ba05985c34688

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