Malicious PDF — malware analysis report

Static analysis result for SHA-256 fad67b6c4a91f5ac…

MALICIOUS

PDF

34.4 KB Created: 2021-07-04 22:48:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 16a66ca86db51e4609b441e7f923cd6d SHA-1: d9c77d41c924b6c2deeec3736831f95b733211a9 SHA-256: fad67b6c4a91f5ace6de3947e8e0cfc7a8ae2e510690d43d1108664a67f8371c
122 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. It uses a password-protected-archive 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 0.9980

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/406889139/coin-master-hack-no-survey-or-verification-game-hack PDF link annotation
    • http://www.elibrary.perludem.org/repository/roblox-robux-hack-no-survey-no-download-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-free-robux-with-cheat-engine-66-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/tiktok-download-free-jio-phone_GM835599320.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/how-to-get-minecraft-realms-for-free_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/hack-coin-master-using-pc_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-coin-master-free-spins-in-email_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-cheat-com_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-pets-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-hack-1-robux-into-100-rubux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-hack-any-roblox-game-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-free-robux-by-playing-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-hack-roblox-accounts-passwords-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/hack-arsenal-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-fast_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/como-hackear-cuenta-de-roblox-sin-saber-la-contrasea_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-roblox-gift-card-20219_GM431946152.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_002_off00002f9d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F9D 22852 bytes
SHA-256: 13f1d5fb00ee46bbeefa93ecbd5c6a9b712d06badc9399f5a9e01c658c801598
font_01_sfnt_off000062d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62D0 18572 bytes
SHA-256: 3714ff820157558559e7d0653201827560acd429746c0784f855fbf1e368d380

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