Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ce173bff36e4eee…

MALICIOUS

PDF

46.0 KB Created: 2021-06-11 01:22:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 5afbe2f110416810b1a3b9c7b8291302 SHA-1: 18c25366f9bf9423448d01ae39b2b6262c3b62c3 SHA-256: 6ce173bff36e4eee93d9dee61ac14f541065f591f87823b9113bb6933aefb1b0
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a fake CAPTCHA lure designed to trick users into clicking a link, which is a common tactic for phishing or malware distribution. The embedded link points to a site offering 'free generators' and 'game hacks', further reinforcing the deceptive nature of the document. While no scripts were directly extracted, the document's structure and embedded URLs suggest it is intended to redirect users to malicious content, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 6

  • 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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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.tw/app/431946152/hack-roblox-command-prompt-game-hack PDF link annotation
    • https://repository.poltekkesgorontalo.ac.id/repository/roblox-account-taker_GM431946152.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/free-tiktok-likes-generator_GM835599320.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/coin-master-hack-2021-ios-download_GM406889139.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/coin-master-free-coins-today_GM406889139.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/how-to-get-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/coin-master-map_GM406889139.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/how-to-get-free-robux-quiz_GM431946152.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/how-to-hack-in-roblox-prison-life_GM431946152.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/coin-master-free-coin-hack_GM406889139.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/getrobux-ninja_GM431946152.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/free-robux-just-click_GM431946152.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/inject-hack-robux_GM431946152.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/cm-free-spins-and-coins_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_off0000547f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x547F 25760 bytes
SHA-256: 1667d15c075a67471b1851eefb3e3b5f888f6bc23a2cf8f38f7e1e47cd822054
font_01_sfnt_off00008ec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EC5 19048 bytes
SHA-256: b8a452b8f86cf9ab844ff625e70cec5cca7c2a09668b737440002b46dd443935

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