Malicious PDF — malware analysis report

Static analysis result for SHA-256 be5c129660332df4…

MALICIOUS

PDF

33.6 KB Created: 2021-06-29 06:08:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 4da70a347c9ea27cde4b76305f7d3690 SHA-1: 8cb0814c99c4b9f5aa30a4b127dec9b5e829c336 SHA-256: be5c129660332df459cd3a132d67437f9ea4fb808f086fa3d24c07f089e2c276
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-confidence heuristic firing for a game hack redirect lure, pointing to a specific URL. The document body also contains this URL and mentions 'Roblox Hack'. While no scripts were extracted, the presence of a malicious URL and the lure suggest the document is designed to trick users into downloading malware or visiting a malicious site.

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.co/app/431946152/roblox-hack-scripprison-ecape-game-hack PDF link annotation
    • https://smark.com.tw/image/data/files/free-spin-coin-master-hacktoman_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-robux-hack_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/roblox-cheats-doawnload_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-400-spins-coins-master_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-hack-spin-link_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-roblox-account-email-and-password_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-free-coins-and-spins-online-tool_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-spin-and-win-coin-master_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-spins-free-2021_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/robuxmatch-com-free-robux_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/hack-coin-master-using-cheat-engine_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/how-do-u-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-rare-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-spins-for-free_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-draw-2-roblox_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_off00002f5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F5A 21568 bytes
SHA-256: 914719bd4845d31333f849ef006f86d7afd87e25dcd66fa947d7b28a180b5ef9
font_01_sfnt_off00005e99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E99 18952 bytes
SHA-256: 1db5b12e18f3af06d97adf91874094cfe77a8f6338d1a5d269276cb8d2a61675

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