Malicious PDF — malware analysis report

Static analysis result for SHA-256 f66745576cb37ec6…

MALICIOUS

PDF

44.5 KB Created: 2021-05-19 07:54:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 875166e6be7f9416c9a8d58324ed5386 SHA-1: 15a3eee397bad52ea3570ad72465749eb120f154 SHA-256: f66745576cb37ec61096e0b557d96024c83f455781f967fd67f2db477a67e3cc
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 0.9632

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.xyz/app/835599320/tiktok-free-view-iphone-video-game-hack PDF link annotation
    • http://kulturlandschaften.eu/images/minecraft-net-download-free_GM479516143.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/roblox-cheat-codes_GM431946152.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/coin-master-free-spins-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/robux-codes-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/minecraft-multiplayer-free_GM479516143.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/rare-free-links-to-coin-master_GM406889139.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/coin-master-free-spins-daily-link-updated_GM406889139.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/coin-master-free-spin-game_GM406889139.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/minecraft-net-free_GM479516143.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/coin-master-working-hack_GM406889139.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/how-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/coin-master-real-hack_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000466b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x466B 25164 bytes
SHA-256: dcabf7c09b0fbc6e80e36021f275d5c6dd6fd15827e0bafafc03175005d4429a
font_01_sfnt_off0000801c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x801C 3244 bytes
SHA-256: a35f8d2d428e2f635eeb8def076b28b11e1cf32ebb319f4699558e394e54d3ec
font_02_sfnt_off00008b42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B42 18272 bytes
SHA-256: 79008d259d53a9d4f8d9b9abdf1e4b2e1346a314a080d7f232d04e595d6bbc38

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