Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c8e002952dece4d…

MALICIOUS

PDF

36.1 KB Created: 2021-07-16 05:48:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 79d21d61c2cbc9449a2c9610ddeb2971 SHA-1: 97061b1608ea4a513e064cb2c0e140b8bca2762a SHA-256: 8c8e002952dece4d98ba69c76cadddaff462ac49d13fe687297a9f3ac1d2aa13
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-severity heuristic firing for linking to a 'free generator / game hack' lure, specifically targeting 'Coin Master' and 'Roblox' related cheats. The embedded URLs, including http://netcdn.tw/app/406889139/coin-master-2021-free-spins-game-hack, strongly suggest a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a social engineering attack designed to redirect users to potentially malicious content.

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/coin-master-2021-free-spins-game-hack PDF link annotation
    • https://goodtools.tw/upload/files/how-to-hack-roblox-game-apocalypse-rising_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-spin-hack-2021_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/a-group-in-roblox-that-gives-free-robux_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-get-free-robux-easy-no-download-2021_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/roblox-pin-code-free_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/hack-to-free-robux_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/hackes-for-money-for-sunset-city-on-roblox_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/como-hackear-coin-master_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/robux-free-robux_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/roblox-place-rewards_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/roblox-hack-the-streets_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-roblox-premium_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-exploits-on-roblox_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-coin-master-gift-link_GM406889139.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_off000038a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x38A1 22472 bytes
SHA-256: 6c51f0cbfab0e95e007a41fbde4d5208459bcf0a0fb0978f3d5d1af27f988b0d
font_01_sfnt_off00006a87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A87 18288 bytes
SHA-256: 512188fbd9df787eb973cc190579836d1eec1c2cf91c6a5c2e6dbe230c0a69fa

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