Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba6ef6cd8d17f4b8…

MALICIOUS

PDF

34.3 KB Created: 2021-07-07 19:50:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 779caa0b81fd27d2d009f1135228399d SHA-1: 1f3d2e69218331334a10179ffc52de108dc43a90 SHA-256: ba6ef6cd8d17f4b845a0582b4197177b21e5570935ae6e8ee91df6176790dde4
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-confidence heuristic indicating it links to a 'free generator / game hack' redirector, specifically http://netcdn.tw/app/479516143/how-to-download-wurst-game-hack. This lure is commonly used to trick users into downloading malicious payloads. While no scripts were extracted, the PDF structure and embedded URLs strongly suggest a phishing or malware distribution attempt.

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/479516143/how-to-download-wurst-game-hack PDF link annotation
    • http://www.opac.stieimalang.ac.id/repository/hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/static-moonactive-net-rewards_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/minecraft-114-4-download-free_GM479516143.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/free-spin-coin-master-app-download_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/wil-they-cheat-roblox-thumbnail_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/coin-master-hack-apk-2021-ios_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/girl-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/oprewards-points-generator_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/is-minecraft-earth-free_GM479516143.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/coin-master-free-spins-link-blogspot-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
font_00_sfnt_off000030e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30E8 22092 bytes
SHA-256: fa48ec4cf85fcd8fafac9299f9a411a6ad56fa1f00604446bdf4694e7a2fc23c
font_01_sfnt_off000061da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61DA 18796 bytes
SHA-256: 974dfa452ea15aa64f7e9e90f11c9f5a0f04a0e92250d8953572ff33ab2f5b0d

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