Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ebf7e51be48232f…

MALICIOUS

PDF

35.8 KB Created: 2021-07-04 12:02:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 521dc3fecae9f25271c94ba5f8716956 SHA-1: 3c361df50d907165a4f0518af1b49ada913f0de3 SHA-256: 9ebf7e51be48232f6a533015daedfeaaf529f52638ca8a1774214d48e6557e01
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document uses a game hack lure, specifically mentioning 'Coin Master Game Hack', to entice users to click on a link. This link, http://netcdn.tw/app/406889139/coin-master-game-hack-game-hack, is identified as a high-risk external URI and a game hack redirector. The document's structure and embedded links strongly suggest it is designed to lead users to a malicious site, likely for downloading further malware or exploiting vulnerabilities.

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-game-hack-game-hack PDF link annotation
    • https://pustaka.stie-pembangunan.ac.id/repository/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/how-to-get-free-funds-on-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/free-things-in-the-roblox-catalog_GM431946152.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/free-robux-app-real_GM431946152.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/free-robux-redeem-codes-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/hack-roblox-apk-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/free-robux-code-genrator_GM431946152.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/uitbxclub-roblox-robux-hacking_GM431946152.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/how-to-get-free-robux-2021-working_GM431946152.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/synapse-roblox-free-download-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/free-coin-master-cheats_GM406889139.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/10-weird-scary-hacker-storys-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/roblox-hack-cilent-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/roblox-fly-hack-download-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/roblox-free-robux-hack-apk-download_GM431946152.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_off0000344b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x344B 23356 bytes
SHA-256: 626f522b362aa87d1ea9d611fd4501482874a5be983118d1dc7b7be17786fe8b
font_01_sfnt_off00006938.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6938 18264 bytes
SHA-256: c1c21b29a6afb4d06e4d6845aa9afd5500216469eff45eb2d027be7bd9c24dc5

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