Malicious PDF — malware analysis report

Static analysis result for SHA-256 40ff1b8cc1381d05…

MALICIOUS

PDF

36.4 KB Created: 2021-07-07 08:02:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 43ddb4548d4576bb033d352ff7cfa135 SHA-1: 8065c29035d58a3bb61388dfcc708f2d6e8c2863 SHA-256: 40ff1b8cc1381d05a905c63cc4112af06d60584eedbc77a93565baa8463441ba
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded URLs that redirect to sites offering game hacks and free in-game currency, a common lure for malware distribution or phishing. The heuristic firings confirm the presence of external URIs and a game hack redirect lure. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to trick the user into downloading a secondary payload or visiting a malicious website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9886

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/406889139/coin-master-connection-lost-game-hack PDF link annotation
    • https://smark.com.tw/image/data/files/apk-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/roblox-game-download-hacks-studio-login-guide-unofficial_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-robux-youtube_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-game-hacking_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/how-to-get-free-gold-cards-on-coin-master_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-roblox-boy-hair_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/is-minecraft-vr-free_GM479516143.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/get-free-robux-info_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/how-to-setup-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/www-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-and-safe-robux_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/roblox-hack-infinite-jump-new_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/robux-generator-no-verification-needed_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/hack-coin-master-game-apk-download_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/can-i-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FB3 22700 bytes
SHA-256: ed499466e48f8864b3d4b984f6ef6a193730db24d5ff1e4b5ad39154695bcab6
font_01_sfnt_off00006289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6289 2896 bytes
SHA-256: c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
font_02_sfnt_off00006c6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C6E 17836 bytes
SHA-256: a76b435a66663bc960d26f3f6b43f7089cbbf554bd18db08d117cbb299e70e3d

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