Malicious PDF — malware analysis report

Static analysis result for SHA-256 b97b11449d2c3d20…

MALICIOUS

PDF

34.5 KB Created: 2021-07-05 00:15:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 7c9f309a1bfc39cce953cd2e519770de SHA-1: 646b9ebca06c1384a5100222946e3057bbbe8ba5 SHA-256: b97b11449d2c3d20c54c37954678a9f345262e47154df7c23f32da99811a4dfa
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/coin-master-2021-free-spins-game-hack PDF link annotation
    • https://library.stikeswnpalu.ac.id/repository/free-robux-images_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-robux-no-waiting-pastebin_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/hack-runner-roblox_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/collect-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/minecraft-launcher-download-free_GM479516143.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-robux-group_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-hack-blog_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-robux-safe_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-robux-android_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-tiktok-hearts_GM835599320.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-speed-cheat_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-knives-on-assassin-roblox_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/hack-peoples-roblox-account_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/robux-for-free-website_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/haktuts-coin-master-today_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_off000030a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30A1 22700 bytes
SHA-256: 36c76dd2e646a59b9f60c0fff4600ee65659146759be2aac5ea1f5e7efa85eb9
font_01_sfnt_off00006339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6339 18576 bytes
SHA-256: 35e5f20b05e6bdeb821d9650870183b7a7c1f79b7df8c2ba0d9c963e0c273a4f

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