Malicious PDF — malware analysis report

Static analysis result for SHA-256 c486253cf7030d18…

MALICIOUS

PDF

46.2 KB Created: 2021-06-03 14:43:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d92c8e7dd612b4abd6b4583770ba4bf5 SHA-1: ce946146e2cd6b32c67d53f51e921b8c30dc15b2 SHA-256: c486253cf7030d1883c4d1efe70b503acae6529edafd7d9c559725a67b78c88c
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a fake CAPTCHA lure to entice users into clicking a link, which redirects to a game hack generator. The primary malicious URL identified is https://netcdn.online/app/406889139/coin-master-gold-cards-free-link-game-hack. While no scripts were directly extracted, the PDF structure and heuristics suggest it's designed to exploit user interaction for potential further malicious actions, possibly involving client-side execution or redirection to malicious sites.

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/406889139/coin-master-gold-cards-free-link-game-hack PDF link annotation
    • https://library.uigm.ac.id/repository/earn-robux-online_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/hacks-roblox_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/pubg-uc-ykleme-perdigital_GM1330123889.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-robux-scams_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-promo-code-2021_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/are-minecraft-realms-free_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-cheat-engine-hack_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-hair-roblox_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-vip-server-roblox_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-avatar-girl_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/pubg-uc-100k_GM1330123889.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_off000051f4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51F4 28852 bytes
SHA-256: 6eb0a9d2a5b856c8c8e10c4936fef4453cc9b4129cae921b04c571896b53fe10
font_01_sfnt_off000092a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92A5 18128 bytes
SHA-256: 3c7d889e052bb081026c5a88f6ee2afe5bc892e32bf973502febc93f4313d009

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