Malicious PDF — malware analysis report

Static analysis result for SHA-256 c49cacd2babdb89a…

MALICIOUS

PDF

48.7 KB Created: 2021-06-03 08:01:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: c25113b7546fd7be2e8c6da78e89ff75 SHA-1: 41780ca5459655ae5e8be9353eecccd9f9badaba SHA-256: c49cacd2babdb89a414ae27868cc7dfefd373e7f9aee4f14032832259efa61c4
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 0.9796

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/431946152/roblox-free-clothes-hack-game-hack PDF link annotation
    • http://www.elibrary.fl.unud.ac.id/repository/coin-master-hack-2021-without-human-verification_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/free-spins-for-coin-masters_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/minecraft-pe-015-0-apk-free-download_GM479516143.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/how-to-get-free-robux-without-download-apps-or-survey_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/how-to-give-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/coin-master-hack-unlimited-spins-and-coins-cheats_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/minecraft-bedrock-edition-pc-download-free_GM479516143.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/roblox-but_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5489 27016 bytes
SHA-256: 83d65d224ce08ded77ac335f5e128effc733904ae86bd9466612c5c920b489a7
font_01_sfnt_off00008e3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E3D 3884 bytes
SHA-256: 64ea6bfd232c3abde76d8b86727203bfa3f935a5783cd0c1f642cf6d3fb42b29
font_02_sfnt_off00009ae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AE4 18616 bytes
SHA-256: 103feac3cc5aa8b61edffdeede0b2c422429be550018f77d71a4c0e7d6940ea7

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