Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff414027c4e78426…

MALICIOUS

PDF

45.1 KB Created: 2021-06-08 21:27:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 36945380434ff958a05223a2a9b90c3f SHA-1: 1859bd3700859072f31770c2f237d6f0de6d8896 SHA-256: ff414027c4e78426cdb4f6abe8ec972152d3967fd7f06da248c5be86e71e4190
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a high-confidence heuristic indicating it links to a game hack lure, specifically for Roblox. It also displays a fake CAPTCHA or human verification prompt to trick the user into clicking the malicious link. The primary IOC is the external URI pointing to a game hack generator, which is likely a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 6

  • 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
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.tw/app/431946152/roblox-room-cheat-codes-game-hack PDF link annotation
    • http://autoskola-scp.com/files/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/adopt-me-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/actual-free-robux_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-to-o-get-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/coin-master-hack-online-download_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/coin-master-el-tiger-card-free_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-bling-bling-card-coin-master_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-robux-working_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-exploits-for-roblox_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/minecraft-java-edition-free-download_GM479516143.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-to-play-coin-master_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/cute-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/coin-master-free-spins-for-iphone_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
font_00_sfnt_off00004eac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4EAC 27264 bytes
SHA-256: 684e43584175b1ce51a1c2ea3496829be8283c812754040a64aa1837f98f76e2
font_01_sfnt_off00008c58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C58 18716 bytes
SHA-256: 7df39115b50b1c63684bf602d6d7641668de531f3285972999018811e9b29a17

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