Malicious PDF — malware analysis report

Static analysis result for SHA-256 40a0230c188523fb…

MALICIOUS

PDF

43.7 KB Created: 2021-06-03 07:19:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: a54d8fba7bb509ad35f27a8d88ead60f SHA-1: e3f144f67166ba5f8a412a318a757923aa143900 SHA-256: 40a0230c188523fba65b88028fb75c1fc25a1d60ccdeddca12eff62a54e45ed7
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 0.9865

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/479516143/how-to-make-a-server-in-minecraft-java-for-free-game-hack PDF link annotation
    • http://library.umla.ac.id/repository/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/minecraft-bedrock-client_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-fan_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-minecraft-premium-account_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/pubg-uc-shop_GM1330123889.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-spin-link-coin-master-app_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/minecraft-java-edition-free-download_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-get-free-pet-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-fan-page-giveaway_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-minecraft-maps-pe_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/hacker-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-printable-roblox-images_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-to-earn-free-spin-in-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_off00004f04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F04 24996 bytes
SHA-256: b325583f20a08cd82a27644d08fdd8d9752ceefec54677f27bbe26aeb7fc1b98
font_01_sfnt_off00008810.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8810 18324 bytes
SHA-256: 9279d0b6186d29dee92c92ea41ad607c96b6d67fd8c4a148fb7dbd95f22d9888

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