Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a989ab2b131dd87…

MALICIOUS

PDF

43.4 KB Created: 2021-06-04 04:18:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: b72757b021c83df7e7fcf4bc00f4e6f1 SHA-1: 435e2956e985798c012e88f5776d047c4d5d246e SHA-256: 9a989ab2b131dd8759da4fb34b4a8e6f5ddcd2548b7607cd853c90da0f7dfa32
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. 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 0.9865

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/431946152/robux-games-game-hack PDF link annotation
    • https://perpus.poltekkesgorontalo.ac.id/repository/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/robux-free-online_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/download-apps-for-robux_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/coin-master-hack-apk-33-download_GM406889139.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/coin-master-free-spins-daily-fb-champion_GM406889139.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/coin-and-spin-link_GM406889139.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/earn-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/free-spins-in-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/coin-master-hack-ios-2021_GM406889139.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/how-to-download-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/block-best-robux_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/totally-free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/coin-master-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • https://perpus.poltekkesgorontalo.ac.id/repository/coin-master-hack-2021_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_off00004eca.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4ECA 24428 bytes
SHA-256: e5a8b9de8255f8f16c5d6a06544078294f2b49276d69a812c41e0b98fe7a0e67
font_01_sfnt_off000086ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86AB 18340 bytes
SHA-256: b82f5f73f60487d2b2d2d8958281bab99adf402bec0dbfa9b87e19c95f2b72ba

Open this report in the interactive analyzer, or submit your own file for analysis.