Malicious PDF — malware analysis report

Static analysis result for SHA-256 9412a73793f958f4…

MALICIOUS

PDF

35.6 KB Created: 2021-07-06 10:36:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-12
MD5: a2fd2e15bf80557d88430f499aa5c32f SHA-1: 6a0386d3bc282a1d35917718fb7ae2437e2b39a0 SHA-256: 9412a73793f958f4aacd2d79ae365045dbd15fe1d73750b4c3be2536b1763f1c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a lure for a "Coin Master Hack Online No Human Verification" which redirects to malicious infrastructure. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content or download further malware. Although no scripts were explicitly extracted, the nature of the lure and the redirector suggest a potential for client-side exploitation or further payload delivery.

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/coin-master-hack-online-no-human-verification-game-hack In PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-minecraft-resource-packs_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-pet-simulator-how-to-get-a-free-rainbow-dominus_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-com_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-booga-booga-instant-kill-hack_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-speed-hack-jailbreak_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-roblox-accounts-biz_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-make-a-minecraft-bedrock-server-for-free_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-discord_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-hack-mod-apk-2021-download_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-nowcom_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-raf-free_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-400-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/minecraft-free-download-pc_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-cheat-codes-for-rocitizens_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
stream_002_off0000344c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x344C 22844 bytes
SHA-256: b613aaec85665198bd1078fdea27ac9364a85e84b6df02ef90ec3fc0cb449af5
font_01_sfnt_off00006770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6770 18612 bytes
SHA-256: 338fae3f97a5e5398a6cf0b8c994910b70de825f0c392734b88d1d7319a72caa

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