Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5ccd068d4441d10…

MALICIOUS

PDF

35.0 KB Created: 2021-07-04 06:54:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 0122e593f040d04f2588510d9adbaf57 SHA-1: e650e8434e20695f98fa518cf323545ba567b736 SHA-256: b5ccd068d4441d10d474880f0034d58a9bae191aea621af6ca85027cec9c31ea
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-severity heuristic indicating it links to a game hack lure, specifically pointing to 'http://netcdn.tw/app/406889139/100-hack-coin-master-game-hack'. This suggests the document's primary purpose is to trick users into visiting a potentially malicious site, likely for malware distribution or credential harvesting. While no scripts were explicitly extracted, the nature of the lure and the numerous embedded URLs related to game hacks and free currency point towards a social engineering attack.

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/406889139/100-hack-coin-master-game-hack PDF link annotation
    • https://foc.vn/public/upload/files/free-robux-com-real_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/coin-master-free-gold-cards_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/free-roblox-shirt-template-2021_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/tiradas-coin-master_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/how-to-get-shiny-teeth-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/roblox-star-wars-lightsaber-battles-hacks_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/roblox-cheat-enginefor-rodebux_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/coin-master-free-spins-2021-hack_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/raspberry-roblox-hack_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/c-face-get-for-free-roblox_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/how-to-get-free-robuxs-proof_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/check-cashed-v3-roblox-speed-hack_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/does-roblox-track-the-ip-of-the-hacker_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_off000031eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31EB 23156 bytes
SHA-256: 949613b39a170dce0052a826c706e7b780948b0fc7d5157b18744f97641ae52c
font_01_sfnt_off00006618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6618 18280 bytes
SHA-256: f6797d4b75acbc4c9628d8c5a5329642bbd0e0b45dea8898f5d31ce971109785

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