Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0e8f2e871fb9940…

MALICIOUS

PDF

35.7 KB Created: 2021-07-04 15:57:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3eed29a4b48e46c27a09927799448a93 SHA-1: a8eb851f086add7dddde304d63ed7d704750c4cb SHA-256: d0e8f2e871fb9940deb411ec294ce8a6028b15ebf2c3836f6f3f5aacab594bb5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a redirector hosted at 'netcdn.tw', which is flagged as malicious infrastructure. The document body and embedded URLs suggest a lure for game hacks or free currency, a common social engineering tactic. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious redirector designed to lead users to potentially harmful content.

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/offers-to-complete-and-get-free-spins-in-coin-master-game-hack In PDF document text
    • https://library.univthamrinaka.com/repository/porque-hackean-roblox_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/roblox-piano-hack_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/ultimate-roblox-hacking-robux-website_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/coin-master-email-rewards_GM406889139.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/free-money-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/play-free-roblox-war-games_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/wurst-client-112-2_GM479516143.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/robux-cheat_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/free-minecraft-account_GM479516143.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/synapse-roblox-download-free_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/minecraft-apk-114_GM479516143.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/roblox-rcm-free-trial_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/free4mobile-info-roblox-hack_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/coin-master-60-spins_GM406889139.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/roblox-fly-hack-we-are-devs_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/free-minecraft-severs_GM479516143.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/can-i-hack-coin-master-with-lucky-patcher_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_off00003460.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3460 23028 bytes
SHA-256: 0ba93014e5625304e7036a7a4016ac82334063d1e267eee8e86a664a2340701d
font_01_sfnt_off000067f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67F6 18680 bytes
SHA-256: 2a7bb7f23522a1dd313ffdbcd397222ab2779f4df9b926982d15749062ee0bca

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