Malicious PDF — malware analysis report

Static analysis result for SHA-256 aee2474704418296…

MALICIOUS

PDF

34.4 KB Created: 2021-07-06 01:24:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: c9b7ff5ce3995bb56f2b6ca6e7518e9e SHA-1: 49ece27c03ef53d41c69385ba2d3c7ccb5bdb3c2 SHA-256: aee2474704418296b3e50ba102d305acba4a7fa127a0ac38879a4378b3e47885
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-risk heuristic firing for linking to a game hack redirector, specifically targeting 'Coin Master' free spins and coins. The document body and embedded URLs reinforce this lure. While no scripts were extracted, the primary malicious function appears to be directing the user to the suspicious URL http://netcdn.tw/app/406889139/free-spins-and-coins-coin-master-game-hack, which is likely a phishing or malware distribution 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.tw/app/406889139/free-spins-and-coins-coin-master-game-hack PDF link annotation
    • https://www.cow-style.com.tw/upload/files/coin-master-free-stuff-links_GM406889139.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/is-windows-10-minecraft-free_GM479516143.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/kids-games-free-roblox-download_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/coin-master-cheat-free_GM406889139.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/optifine-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/how-to-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/minecraft-win-10-free_GM479516143.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/hacks-scripts-for-roblox_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/free-disney-plus-accounts-tiktok_GM835599320.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/minecraft-for-free-apk_GM479516143.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/roblox-free-bundles_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/plutonium-hack-roblox_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/how-to-get-roblox-clothing-free_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/free-minecraft-skins-ps4_GM479516143.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/how-to-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/free-robux-bis_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/roblox-robux-hack-really-works_GM431946152.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3065 22988 bytes
SHA-256: ae53b15f429ede504be8831314e4165226c26d702fff6608584fe9cf0b2e0ccc
font_01_sfnt_off00006364.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6364 18348 bytes
SHA-256: e3514f5c13c59f74fe131b320bb4a7a21799b0fccf5b53c141d50f68870e844d

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