Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0efaa1ba0645a59…

MALICIOUS

PDF

44.6 KB Created: 2021-06-03 23:19:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 377128845bf9d389cbd274ff6f783b6e SHA-1: 96f4d8f7cf4c2f241c963f4ba1a24617ddf19a86 SHA-256: c0efaa1ba0645a59bf0a5aaac411c9f381d3c5c19ac6b963fa38b3fd2b6b1c1f
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 0.9865

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/479516143/minecraft-beta-free-game-hack PDF link annotation
    • http://otomasi.stikesmuhgombong.ac.id/repository/how-to-get-free-spins-on-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://otomasi.stikesmuhgombong.ac.id/repository/roblox-shirt-template-free_GM431946152.pdfIn PDF document text
    • http://otomasi.stikesmuhgombong.ac.id/repository/minecraft-windows-10-key-free_GM479516143.pdfIn PDF document text
    • http://otomasi.stikesmuhgombong.ac.id//repository/pubg-uc-600-sri-lanka-price_GM1330123889.pdfIn PDF document text
    • http://otomasi.stikesmuhgombong.ac.id//repository/how-to-hack-roblox-accounts-passwords_GM431946152.pdfIn PDF document text
    • http://otomasi.stikesmuhgombong.ac.id//repository/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://otomasi.stikesmuhgombong.ac.id//repository/archery-master-3d-hack-unlimited-coins-cheats_GM406889139.pdfIn PDF document text
    • http://otomasi.stikesmuhgombong.ac.id//repository/roblox-data-breach_GM431946152.pdfIn PDF document text
    • http://otomasi.stikesmuhgombong.ac.id/repository/robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://otomasi.stikesmuhgombong.ac.id/repository/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://otomasi.stikesmuhgombong.ac.id//repository/roblox-games-to-play-for-free_GM431946152.pdfIn PDF document text
    • http://otomasi.stikesmuhgombong.ac.id/repository/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://otomasi.stikesmuhgombong.ac.id/repository/robux_GM431946152.pdfIn PDF document text
    • http://otomasi.stikesmuhgombong.ac.id/repository/minecraft-world-free-download_GM479516143.pdfIn PDF document text
    • http://otomasi.stikesmuhgombong.ac.id/repository/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://otomasi.stikesmuhgombong.ac.id/repository/minecraft-hacks-115-2_GM479516143.pdfIn PDF document text
    • http://otomasi.stikesmuhgombong.ac.id//repository/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://otomasi.stikesmuhgombong.ac.id//repository/free-robux-mobile_GM431946152.pdfIn PDF document text
    • http://otomasi.stikesmuhgombong.ac.id/repository/easy-roblox-today_GM431946152.pdfIn PDF document text
    • http://otomasi.stikesmuhgombong.ac.id/repository/how-to-get-minecraft-windows-10-for-free-with-java_GM479516143.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_off0000540e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x540E 25252 bytes
SHA-256: 837040ce0e8ec8c5f4922baff9db47349ae41fa9ad1ef703341fdd0b985ae6b1
font_01_sfnt_off00008d74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D74 17784 bytes
SHA-256: ffa4e944bc3952cb658e805fb11da1f643d70f63a75572cc293d8aa9f3ac184d

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