Malicious PDF — malware analysis report

Static analysis result for SHA-256 5321ef928cc20808…

MALICIOUS

PDF

46.1 KB Created: 2021-06-03 06:37:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 62dc0c45e8b73d58f528e8a4b735aeb3 SHA-1: bf6e204c896ac63d483ca643234d9410b4321505 SHA-256: 5321ef928cc20808f17d34f571ca3773199bd18d0a161036ee2df224e50103db
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA 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 0.9864

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.online/app/479516143/minecraft-anarchy-server-no-hacks-game-hack PDF link annotation
    • http://perpus.masda.ac.id//repository/master-coin-hack-mod_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/httpswwwurcouponsdealcom202103coinmasterfreespinandcoinlinkshtml_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/minecraft-free-download-android-apk-014-0_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-coins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/how-to-get-free-spins-on-coin-master-2021-links_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/minecraft-pocket-edition-free_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/roblox-sued_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-free-coins-link-2021-deutsch_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/new-free-money-links-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/hackear-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-vip-server-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/easy-robux-today_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-roblox-girl-hair-not-a-model_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-account-hacker-tool_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_004_off000053e1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53E1 29564 bytes
SHA-256: a72ef3456461ff2bdb05b5224ddf4d996d9c01f81e158149cabe52576f14ed22
font_01_sfnt_off0000919c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x919C 18340 bytes
SHA-256: 25c1286fde013f5a892faec283bed83878941bbea70c27f39483b80af7cfb438

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