Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7ab06c71accb37f…

MALICIOUS

PDF

45.7 KB Created: 2021-06-08 16:45:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: cddc729b534eb831e63b449d7513f864 SHA-1: 674a74f63e7b298e95b55b76402aa7272c666bc0 SHA-256: f7ab06c71accb37faab9c738943ba40f44a525a0117f2be812355c2940114929
122 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure to trick users into clicking a link. The linked URL, 'https://netcdn.tw/app/431946152/roblox-lion-roleplay-cheats-game-hack', is presented as a game hack generator, which is a common social engineering tactic. The document's structure and content suggest it is intended as a phishing or scam document, likely delivered as an attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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 https://netcdn.tw/app/431946152/roblox-lion-roleplay-cheats-game-hack PDF link annotation
    • https://lib.bunghatta.ac.id/app/repository/coin-master-free-spin-link-new_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/coin-master-free-spins-hack-link_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/coin-master-spin-ml-link_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-minecraft-mods-for-xbox-one_GM479516143.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-roblox-fe-scripts-pastebin-july-2021_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/coin-master-free-spins-whatsapp-link_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/coin-master-hack-apk-android_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/freespinandcoin-blogspot-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/hacks-roblox_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/is-coin-master-hacks-safe_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-spins-and-coins-coin-master-facebook_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/coin-master-admin-free-spins_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/minecraft-free-download-mac-full-version_GM479516143.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-gold-cards-for-coin-master_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_off000054e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54E3 25084 bytes
SHA-256: e94aab556fa8dd948e03fe01f4e6de56251f97e29e3d1b58b79aac89a8138e20
font_01_sfnt_off00008e89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E89 18760 bytes
SHA-256: 45ea3f538220096d32879c380f7dc53542d6421017d51ee99af7d1fbbec5a312

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