Malicious PDF — malware analysis report

Static analysis result for SHA-256 8849d574a98b86f8…

MALICIOUS

PDF

34.7 KB Created: 2021-07-07 01:47:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e4f8a34ba7e84d1450e03faddf64264e SHA-1: ad3345b3b14f6b027ffa5f5f0229ae5b31d9f577 SHA-256: 8849d574a98b86f80aa5ac0c54165afc306d2da3479188b2a14902cc255fca61
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/431946152/roblox-avatar-maker-free-game-hack PDF link annotation
    • https://cogp.greentrade.org.tw/image/data/files/tiktok-free-invitation_GM835599320.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/how-can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/free-robux-on-ipad-easy_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/how-to-cheat-noclip-in-roblox-2021_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/coin-master-free-gift-link-2021_GM406889139.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/free-robux-safe_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/roblox-free-robux_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/roblox-free-dominus-hat-not-model_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/when-is-vesteria-roblox-predicted-to-be-free_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/coin-master-free-spins-link-cheat_GM406889139.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/roblox-hat-free-2021_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/roblox-studio-free-download_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/how-to-hack-coin-master-game-without-root_GM406889139.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/change-roblox-username-free_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_off00002fcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FCF 22548 bytes
SHA-256: 07c3be27b046b30b07b7882894588516e3074fbfdc5a8194fab42d2086222552
font_01_sfnt_off0000621e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x621E 19236 bytes
SHA-256: 6e0682d0e3debb2d4c4c9a17f2eb9a9f2fd830994e30009324975d898f503a12

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