Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cbcfdca3c0ff4a2…

MALICIOUS

PDF

41.8 KB Created: 2021-05-18 03:00:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 0a060cb554538aab5c76cf0762b737c1 SHA-1: 235c8c24a135c3b653effa1940d973e45e339c1d SHA-256: 4cbcfdca3c0ff4a22f47918ce2dae010f83c655e929bb85ef79299ee9508ad18
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 0.9971

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.xyz/app/406889139/coin-master-time-hack-ios-game-hack PDF link annotation
    • http://nebraskahospitalityhalloffame.com/images/free-minecraft-codes-2021_GM479516143.pdfIn PDF document text
    • http://nebraskahospitalityhalloffame.com/images/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://nebraskahospitalityhalloffame.com/images/minecraft-bedrock-edition-pc-free_GM479516143.pdfIn PDF document text
    • http://nebraskahospitalityhalloffame.com/images/how-do-you-hack-for-2021000-coins-on-flip-master_GM406889139.pdfIn PDF document text
    • http://nebraskahospitalityhalloffame.com/images/roblox-free-accessories_GM431946152.pdfIn PDF document text
    • http://nebraskahospitalityhalloffame.com/images/coin-master-hack-online-cheat_GM406889139.pdfIn PDF document text
    • http://nebraskahospitalityhalloffame.com/images/best-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://nebraskahospitalityhalloffame.com/images/how-to-get-free-daily-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://nebraskahospitalityhalloffame.com/images/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://nebraskahospitalityhalloffame.com/images/roblox-bux-free_GM431946152.pdfIn PDF document text
    • http://nebraskahospitalityhalloffame.com/images/is-roblox-studio-free_GM431946152.pdfIn PDF document text
    • http://nebraskahospitalityhalloffame.com/images/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://nebraskahospitalityhalloffame.com/images/try-minecraft-free_GM479516143.pdfIn PDF document text
    • http://nebraskahospitalityhalloffame.com/images/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • http://nebraskahospitalityhalloffame.com/images/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://nebraskahospitalityhalloffame.com/images/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://nebraskahospitalityhalloffame.com/images/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://nebraskahospitalityhalloffame.com/images/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://nebraskahospitalityhalloffame.com/images/free-roblox-templates_GM431946152.pdfIn PDF document text
    • http://nebraskahospitalityhalloffame.com/images/coin-master-free-spins-no-survey_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_003_off00004b0a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B0A 24360 bytes
SHA-256: 7410e8af75223e7bcaf0962fe352c5ca7e30501e1d1afa059488299aa053e0ba
font_01_sfnt_off0000821a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x821A 17976 bytes
SHA-256: 655a12c454514dd8530ca1f99360ddd50a64d293630b44ede153b337a3b108cc

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