Malicious PDF — malware analysis report

Static analysis result for SHA-256 29fbfb8cd9d2c770…

MALICIOUS

PDF

47.8 KB Created: 2021-06-04 00:02:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0530aba4bad9d5fbeb0b3fe854adc603 SHA-1: 4eb0355a0459baeda4b627dc5823a81ff617860b SHA-256: 29fbfb8cd9d2c7704f4e3815fdbd5081b91caea351eabe879efb6d2941143e36
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 0.9832

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-hack-tool-without-human-verification-game-hack PDF link annotation
    • http://library.gkigadingserpong.org/repository/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-without-verify_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/cheat-roblox-2021-btools_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/play-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-minecraft-for-free-on-ipad_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-install-minecraft-for-free-on-ios_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-get-free-roblox-items_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/new-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/http-blackgamesus-coinmasterhack_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/oprewards-com-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/robux-for-surveys_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-spins-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
stream_004_off000052ee.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52EE 30792 bytes
SHA-256: a8e883fabc1b3c5e934063e3f447f589045e7439b90d15212a96a211d76c6c35
font_01_sfnt_off00009760.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9760 18688 bytes
SHA-256: bfb5482a37b2527fc2c6c9b4f01bf6855a084aee948f18cbf4edde79c7c9bcfc

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