Malicious PDF — malware analysis report

Static analysis result for SHA-256 66ffdb71cc10ffd9…

MALICIOUS

PDF

35.1 KB Created: 2021-06-25 20:43:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9cf0094b185fd9a9595492a60a5db0f2 SHA-1: 2cd5cb21fa5b5d2c4e47fca7c5ad1cd3161b4714 SHA-256: 66ffdb71cc10ffd9ceb22231f1fa134e494487fba58e5507ad84ef0b92e9cffa
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for game hacks and password generators, directing users to a malicious redirector. The embedded URLs and document body text strongly suggest a phishing or scam attempt designed to trick users into visiting malicious sites. No scripts were extracted, but the presence of multiple malicious redirector links indicates a high likelihood of further malicious activity.

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-get-someones-roblox-password-for-free-2021-game-hack In PDF document text
    • https://pustaka.mic.sch.id//repository/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/minecraft-114-4-download-free_GM479516143.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/gift-card-roblox-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/free-stuff-in-roblox-hack_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/free-admin-roblox-games_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/roblox-spiel-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/roblox-hack-badge_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/instagram-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/cluster-sphere-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/how-to-get-free-obc-on-roblox-no-hacks_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/free-robux-questions_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/coin-master-hack-org_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/coin-master-how-to-get-free-pet-food_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/how-to-get-free-items-on-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/roblox-cheat-engine-66-noclip_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-robux-instantly_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/coin-master-official-page_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_off000030ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30ED 21960 bytes
SHA-256: 30809f8553aed8e7a2a988187198225b58decf46f960d8e733577b2aa48a1a9e
font_01_sfnt_off00006172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6172 19908 bytes
SHA-256: 67b62208e162a0445ec071ffcff654d18e1aae0ae4b2f5628514e9847e9c16aa

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