Malicious PDF — malware analysis report

Static analysis result for SHA-256 b66e8d521bfc679d…

MALICIOUS

PDF

45.3 KB Created: 2021-05-14 13:34:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 8c12f9607b7698656979545828d1dadb SHA-1: c4e7a4685996e9023b97725bc236d3dc011312cd SHA-256: b66e8d521bfc679d0a547012eab843d0eaad6d08c8c729ea04a7aa35f7a6948b
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for free game currency or hacks, directing users to a malicious URL. It also displays a fake CAPTCHA, likely to trick users into interacting further. The embedded URLs and the document's content strongly suggest a phishing or scam attempt designed to lead users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/431946152/how-to-get-free-roebucks-game-hack In PDF document text
    • http://safari-crimea.com/images/minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • http://safari-crimea.com/images/guide--coin-master-free-tips_GM406889139.pdfIn PDF document text
    • http://safari-crimea.com/images/blogspot-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://safari-crimea.com/images/how-to-get-robux-easy_GM431946152.pdfIn PDF document text
    • http://safari-crimea.com/images/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://safari-crimea.com/images/minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://safari-crimea.com/images/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://safari-crimea.com/images/roblox-free-play_GM431946152.pdfIn PDF document text
    • http://safari-crimea.com/images/free-robux-wheel_GM431946152.pdfIn PDF document text
    • http://safari-crimea.com/images/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://safari-crimea.com/images/free-spins-coin-master-app-iphone_GM406889139.pdfIn PDF document text
    • http://safari-crimea.com/images/coin-master-bonus_GM406889139.pdfIn PDF document text
    • http://safari-crimea.com/images/how-to-hack-coin-master-game-ios_GM406889139.pdfIn PDF document text
    • http://safari-crimea.com/images/coin-master-free-spins-link-2021-blogger_GM406889139.pdfIn PDF document text
    • http://safari-crimea.com/images/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
    • http://safari-crimea.com/images/coin-master-free-spins-and-coins-app-download_GM406889139.pdfIn PDF document text
    • http://safari-crimea.com/images/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://safari-crimea.com/images/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://safari-crimea.com/images/minecraft-alt-accounts-free_GM479516143.pdfIn PDF document text
    • http://safari-crimea.com/images/can-you-get-robux-for-free_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
stream_003_off00004ca2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CA2 29160 bytes
SHA-256: 713eb568b56ee7112c2002959287d0277f1227d3e30694325369785c116d66ac
font_01_sfnt_off00008ef9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EF9 18240 bytes
SHA-256: fb0888cab3cba8d8abe3480d03057911a1e3623fba0647a42738b9adccb4e31a

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