Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4fae3accc5b2174…

MALICIOUS

PDF

33.8 KB Created: 2021-07-09 07:47:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c4c26190743a3cdf388797a6a5917521 SHA-1: 472af8624978a10e4a4a3a8b4e347c052be18cfb SHA-256: e4fae3accc5b2174e9a15642ea2e69de9515e65d06fedfe9308aec8135386dcb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, masquerading as free game hacks and generators. The primary lure URL is http://netcdn.tw/app/479516143/is-minecraft-realms-free-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a malicious redirector workflow designed to lead users to potentially harmful content. The ML classifier also flagged this PDF with high confidence.

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/479516143/is-minecraft-realms-free-game-hack In PDF document text
    • https://anshingtek.com.tw/image/data/files/free-robux-games_GM431946152.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/aimbot-hack-roblox-cbro_GM431946152.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/free-robux-safe_GM431946152.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/earn-free-robux-by-completing-offers-and-surveys_GM431946152.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/how-to-hack-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/minecraft-windows-10-edition-free-download_GM479516143.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/roblox-hack-get-free-robuxs-no-download_GM431946152.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/roblox-robux-2021-hack_GM431946152.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/how-to-get-free-spins-on-coin-master-facebook_GM406889139.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/free-roblox-card_GM431946152.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/free-roblox-cards-pin-number_GM431946152.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/how-to-download-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/offers-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/roblox-dollhouse-hacks_GM431946152.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/roblox-lawsuit_GM431946152.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/free-10-dollar-roblox-card-codes_GM431946152.pdfIn PDF document text
    • https://anshingtek.com.tw/image/data/files/hacks-for-adopt-me-roblox-2021_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_off00003047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3047 22348 bytes
SHA-256: de34a0ac9fa53350947afa1660463b709ffd9c262f5c83e1fdff53366ccd5eba
font_01_sfnt_off00006202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6202 18192 bytes
SHA-256: 3fdf6c7900c76153a6c8ba7010afe065a028b37808fae2d556e2bfe86359ad32

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