Malicious PDF — malware analysis report

Static analysis result for SHA-256 e45b7976ccc618c6…

MALICIOUS

PDF

37.9 KB Created: 2021-07-03 12:06:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c8251358207104f91d17103c51689367 SHA-1: af719569fc7d78d25a9b52c0a1c2382865d86023 SHA-256: e45b7976ccc618c6722f882efc01d75fa2bbe2e02a840fabbd1e71246dd41ccc
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 0.9971

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 http://netcdn.tw/app/431946152/free-robux-no-human-verification-or-survey-2021-game-hack PDF link annotation
    • https://belajar.matsaneta.net/__statics/gudangsoal/files/earn-robux-today-earn-robux-today_GM431946152.pdfIn PDF document text
    • https://belajar.matsaneta.net/__statics/gudangsoal/files/cheat-codes-for-roblox-retail-tycoon_GM431946152.pdfIn PDF document text
    • https://belajar.matsaneta.net/__statics/gudangsoal/files/free-golden-suit-roblox_GM431946152.pdfIn PDF document text
    • https://belajar.matsaneta.net/__statics/gudangsoal/files/hack-roblox-accounts-easy_GM431946152.pdfIn PDF document text
    • https://belajar.matsaneta.net/__statics/gudangsoal/files/how-to-earn-free-robux-fast_GM431946152.pdfIn PDF document text
    • https://belajar.matsaneta.net/__statics/gudangsoal/files/roblox-paintball-hack_GM431946152.pdfIn PDF document text
    • https://belajar.matsaneta.net/__statics/gudangsoal/files/roblox-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://belajar.matsaneta.net/__statics/gudangsoal/files/free-minecraft-java-edition_GM479516143.pdfIn PDF document text
    • https://belajar.matsaneta.net/__statics/gudangsoal/files/robux-free-c_GM431946152.pdfIn PDF document text
    • https://belajar.matsaneta.net/__statics/gudangsoal/files/roblox-free-items-thumbnail_GM431946152.pdfIn PDF document text
    • https://belajar.matsaneta.net/__statics/gudangsoal/files/pokemon-go-free-box_GM1094591345.pdfIn PDF document text
    • https://belajar.matsaneta.net/__statics/gudangsoal/files/coin-master-hack-online-no-human-verification_GM406889139.pdfIn PDF document text
    • https://belajar.matsaneta.net/__statics/gudangsoal/files/roblox-promo-codes-2021-robux_GM431946152.pdfIn PDF document text
    • https://belajar.matsaneta.net/__statics/gudangsoal/files/free-coin-master-spin-generator_GM406889139.pdfIn PDF document text
    • https://belajar.matsaneta.net/__statics/gudangsoal/files/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • https://belajar.matsaneta.net/__statics/gudangsoal/files/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://belajar.matsaneta.net/__statics/gudangsoal/files/coin-master-hack-tool-v1-9-download_GM406889139.pdfIn PDF document text
    • https://belajar.matsaneta.net/__statics/gudangsoal/files/roblox-ninja-dojo-tycoon-cheats_GM431946152.pdfIn PDF document text
    • https://belajar.matsaneta.net/__statics/gudangsoal/files/free-coin-master-hacks_GM406889139.pdfIn PDF document text
    • https://belajar.matsaneta.net/__statics/gudangsoal/files/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • https://www.roblox.com/my/tasksIn 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_off000039e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x39E2 22568 bytes
SHA-256: f9846a62b04d903721ec7430392947e0605bf4733cc5eadbf57789f4bb927fb5
font_01_sfnt_off00006c31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C31 20028 bytes
SHA-256: a686843967d16d630a3d792aecd0df7810ef9440d33d67b3fe7886ce86e787de

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