Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ce7f22472d1138e…

MALICIOUS

PDF

34.7 KB Created: 2021-07-06 05:04:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: fa7adf9c7a7034b6735097037366ff91 SHA-1: ef1cf8192b6ae36de9168c7c6d853aa6698f0801 SHA-256: 5ce7f22472d1138edca895428a38fc0e7a72009126c936dfde3bd6c8f30f394a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains heuristics indicating it's a lure for game hacks, specifically mentioning 'Coin Master' and 'Robux'. It embeds multiple URLs, with the primary one being http://netcdn.tw/app/406889139/how-to-get-free-snacks-in-coin-master-game-hack, which is flagged as a redirector. The document body reinforces this by containing similar game-related lures and URLs. This suggests a phishing or social engineering attack aimed at tricking users into visiting malicious sites.

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/how-to-get-free-snacks-in-coin-master-game-hack PDF link annotation
    • http://www.fkunismuh.org/perpustakaan/repository/youtube-how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/roblox-free-download-windows-7-64-bit_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/picture-roblox_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/how-to-get-free-robux-no-joke_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/give-robux-for-free_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/coin-master-invite-friends-free-spins_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/roblox-free-accessories_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/roblox-extension-hack_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/how-to-hack-someone-in-roblox-easy_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/coin-master-hack-apk-online_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/hack-coin-master-32-mod-apk_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/how-to-hack-destruction-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/how-to-get-free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/free-robux-jailbreak-hack_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/how-to-hack-coin-master-pc_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/master-coins-free_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_off000030d8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30D8 23180 bytes
SHA-256: 675ee22fde94d3697f810377b55ae89cac1f48844c307d5beb42c26f78916cbe
font_01_sfnt_off000064c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64C3 18332 bytes
SHA-256: 9bfaebadd1c63bbcf8fae185af5d645a9ecdb7ad968488e86b545ec7ef79ab2e

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