Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a7d79cbf862f2fe…

MALICIOUS

PDF

33.5 KB Created: 2021-07-03 19:35:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 4cb6c926b8e1c4bdeaae22d50fb9a836 SHA-1: d6ae73b8e08a236551742c94d2214cfe4b037c57 SHA-256: 6a7d79cbf862f2fef35e34e14b872c245b46c9e493a413ea486e53459b6088e6
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 0.9824

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/free-daily-spins-from-coin-master-game-hack PDF link annotation
    • http://digilib.unbari.ac.id/repository/how-to-get-free-robux-game-test_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-free-spin-link-today-16-11-2021_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/conf-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-use-cheat-engine-on-roblox-tycoons_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/do-you-want-free-robux-get-unlimited_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-roblox-hack-no-inspect-no-username-november-2021-pc_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/lifting-simulator-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/fps-hacks-roblox-aimbot-not-pf-v21_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/poke-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-free-spin-and-trading_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-synapse-x-roblox-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/withdraw-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/robux-without-verification_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/paypal-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/can-i-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-gift-link-hack_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_001_off00002aac.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2AAC 23308 bytes
SHA-256: d9c1db0d9b53b6b48c7488f6c9b8f65f0b5ac12326901d9f4e78721db1caa7e7
font_01_sfnt_off00005f22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F22 18856 bytes
SHA-256: d310d8b42a9db28f952d6c808dbfd2c0798e16e205ce104a4cdcfe428c53c924

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