Malicious PDF — malware analysis report

Static analysis result for SHA-256 e456bc35c548a723…

MALICIOUS

PDF

33.5 KB Created: 2021-07-06 06:03:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 245a900d21ea2ef223701ce2300eca9a SHA-1: d32004731009c7e718f66382ef7331ed2dee47dd SHA-256: e456bc35c548a7235da67ae4746ded28da0cffa21411f7f46209879036ac3ef1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, with a primary focus on luring users with promises of free game items and hacks. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_GAME_HACK_REDIRECT_LURE' indicate that the primary URL, http://netcdn.tw/app/406889139/free-spins-coin-master-daily-game-hack, is part of a malicious redirector infrastructure. This suggests the document's purpose is to redirect users to potentially malicious sites for credential harvesting or malware distribution.

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.tw/app/406889139/free-spins-coin-master-daily-game-hack In PDF document text
    • https://www.knjiznica-oroslavje.hr/files/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/coin-master-free-spin-realme-products_GM406889139.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/hackear-juego-coin-master_GM406889139.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/free-promo-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/roblox-a_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/download-free-mundschutz-for-roblox_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/cheat-roblox-mad-city-vf_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/how-to-get-creative-mode-in-minecraft-server-hack_GM479516143.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/robux-fun-hack_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/how-to-hack-roblox-to-get-admin-commands_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/minecraft-114-4-download-free_GM479516143.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/coin-master-hack-spins-android_GM406889139.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/coin-master-free-spins-link-2021-april_GM406889139.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/coin-master-hack-2021-iphone_GM406889139.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/roblox-high-jump-hack_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/how-to-scam-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/how-to-get-hacked-blocks-in-roblox-build-anything_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/roblox-free-robux-genorator-2021-no-suvery_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
font_00_sfnt_off00002e1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E1B 22152 bytes
SHA-256: f6fb8943bc55e6e51a6ce7ab15ee801a6dd048f0371e10f79d721f4f60c7a3e9
font_01_sfnt_off00005f43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F43 18596 bytes
SHA-256: 5411b9dbca58f16f8af8c21ebe49ba809f0efece3103b9aa7bb9d97b6685b20b

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