Malicious PDF — malware analysis report

Static analysis result for SHA-256 445b28f7a9391230…

MALICIOUS

PDF

34.7 KB Created: 2021-06-20 01:14:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-12
MD5: 8c61e005eb6bcf734d6c1b6cb058c38a SHA-1: 0ebd7a537858ea51357d3f93ffd2ac1c5fa70a22 SHA-256: 445b28f7a93912301e33481ec3a4970800c7f3a0f06bfbe65fa6ae8926619f4b
160 Risk Score

Malware Insights

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

The PDF document contains multiple links that redirect to malicious websites, masquerading as game hacks or generators. The primary lure is related to 'Roblox' and 'Coin Master' exploits. The ML classifier strongly indicated maliciousness, and the presence of known malicious redirector infrastructure confirms a high likelihood of a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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 http://netcdn.co/app/431946152/how-to-hack-roblox-account-2021-game-hack In PDF document text
    • http://lib.vipklh.ru/repository/coin-master-links-for-today_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/how-to-hack-a-megavore-in-dino-sim-roblox_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-robux-codes-2021-november_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/links-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/how-get-free-robux-ipad_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-spin-link-in-coin-master-game_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-roblox-resorts_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/hack-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-robux-app-real_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-hack-programers_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-free-cards-and-spin-link_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/hacking-apps-for-roblox_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/if-you-delete-minecraft-can-you-redownload-it-for-free_GM479516143.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/how-to-get-free-spins-for-coin-master_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_off00003006.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3006 22184 bytes
SHA-256: 010c32bb909842fcbea8c7c789e1804f1efa79b6592bc7bf1e5978c8f2d40622
font_01_sfnt_off00006125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6125 19468 bytes
SHA-256: 93e2c47404064c6af01cd1c87067f1fdcbb68b930ed3d2177f7bf4d5ea3dab1b

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