Malicious PDF — malware analysis report

Static analysis result for SHA-256 35a85333a26cb614…

MALICIOUS

PDF

34.9 KB Created: 2021-07-03 14:55:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 501d148bedc5b57db8b717e1a8f66e2e SHA-1: 157130d17467ae8e58476b02449e39acefbb60ee SHA-256: 35a85333a26cb6147bbdc5dfe9db72e815a69f657dbcb5774e97d5f06b350818
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-confidence heuristic indicating it links to a 'free generator / game hack' redirector, specifically http://netcdn.tw/app/406889139/coin-master-daily-free-spins-25-game-hack. This lure is designed to trick users into visiting a potentially malicious site. While no scripts were explicitly extracted, the PDF format itself can embed JavaScript, and the overall structure suggests a phishing or malware distribution attempt.

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-daily-free-spins-25-game-hack PDF link annotation
    • https://vieclamjapan.com/upload/files/free-tiktok-likes-no-survey_GM835599320.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/roblox-username-change-free_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/hack-game-coin-master_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/coin-master-spin-link_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/new-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/hacker-web-roblox_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/minecraft-launcher-download-free_GM479516143.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/coin-master-facebook_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/free-roblox-hair-red_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/how-to-hack-bloxburg-roblox-2021_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/instagram-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/all-free-roblox-promocodes_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/roblox-levitation-animation-pack-free_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/does-coin-master-hack-work_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/free-printable-roblox-coloring-pages_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/robux-hack-generator-no-download_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/coin-master-free-spin-codes_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
stream_002_off00003001.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3001 23036 bytes
SHA-256: 7995baf38d25426e5f15ae3fab691b14f38a91fd2611a926172c8f4c88739b4e
font_01_sfnt_off000063ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63EC 18852 bytes
SHA-256: a487ce0000d3ce43933202f3692ca7cb45ea3e63696d23cb31952fc5e806c807

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