Malicious PDF — malware analysis report

Static analysis result for SHA-256 d77fd6ecb41a5255…

MALICIOUS

PDF

43.6 KB Created: 2021-06-03 07:09:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 1684daff933587da875ec548e4465e5e SHA-1: ab8457966ddb19b65869d4c4be591f55adba6af3 SHA-256: d77fd6ecb41a52551be89ad48262428bd90822ec87cddc2d577b8a2d216c14a9
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a website offering 'coin master game hack'. This lure is designed to trick users into visiting a malicious site, likely for further exploitation or malware delivery. The ML classifier strongly flagged this PDF as malicious, supporting the observed game hack lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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-game-hack PDF link annotation
    • http://library.umuslim.ac.id//repository/rbx-hut_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-robux-offers_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-free-spins-activegamer_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/how-to-find-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/coin-master-apk-hack-35-8_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-35-13-hack-download_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-to-hack-coins-in-archery-master-3d_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-free-spins-link-june-2021_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/tiktok-free-package-dialog_GM835599320.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/rbx-website_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/girl-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-hack-apk-ios_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/minecraft-free-download-no-virus_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/games-like-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/free-coin-and-spin-in-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_off00004fe8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FE8 24960 bytes
SHA-256: 3e1e8e86750f0cf6c2270d6575c4bb4369b134932177da23320e221195c4a57d
font_01_sfnt_off000089b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89B5 17544 bytes
SHA-256: 5ee316c89f58fa7ece53e10d1822e70a80b2e7ece9f31707ca69690d36fdc75d

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