Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbac96bd429ae303…

MALICIOUS

PDF

36.3 KB Created: 2021-07-05 04:34:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 4392a961eb399bc2e81793a2b1a650b9 SHA-1: ee41f4a86ea70bcfdd0779be07bcc4b9e62899c7 SHA-256: cbac96bd429ae3031cb6f0ee1f6c5e0c1e4e04dc5f16d35f1c670dd102c2e0da
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 0.9980

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 http://netcdn.tw/app/406889139/daily-free-spin-link-in-coin-master-game-hack PDF link annotation
    • http://perpus.masda.ac.id/repository/how-does-hacking-in-roblox-work_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/how-to-hack-a-roblox-account-2021_GM431946152.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/hack-velocidad-x3-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/pubg-uc-kodu-yazma_GM1330123889.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-credit-card-payment-download-free_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-hack-online-without-human-verification_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/moon-active_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-group-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-car-tycoon-hacks_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-do-yuo-get-robux-umlimted-free_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-bloxburg-how-to-get-free-money_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-website_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-dungeon-quest-get-unlimited-gold-and-free-vip_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-free-generator_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/hspart-imahsimp-yhsbatch1p-pastebin-free-robuxtype-batch1q20212021shq_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-free-spin-best-link_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/minecraft-bedrock-edition-pc-download-free_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-get-free-radio-gamepass-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-system_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
font_00_sfnt_off0000349c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x349C 23520 bytes
SHA-256: 488477a1359383e9480ef19eaa653084d628d3be83f0cf08c433259a52f150ee
font_01_sfnt_off000069e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69E9 18768 bytes
SHA-256: 21eacade3ac1c19086419b59b929e050e201ab93c9e88e85c324028582351eb9

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