Malicious PDF — malware analysis report

Static analysis result for SHA-256 e817e3c6c4857aaf…

MALICIOUS

PDF

34.9 KB Created: 2021-07-05 23:15:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c383af588438d6e9a39d2e16c53c8ba9 SHA-1: bba69ecf94c76818b2f78b7b8500119706909b35 SHA-256: e817e3c6c4857aafa71e1adee2d4b95c7e997607820d20ac4f2c675f276532ce
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a 'free generator / game hack' which redirects to the URL http://netcdn.tw/app/406889139/free-spin-coin-master-app-download-game-hack. This URL is presented as a call-to-action within the document body, indicating a phishing or scam attempt to trick users into visiting a potentially malicious site. The ML classifier also strongly flagged this PDF as malicious.

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/free-spin-coin-master-app-download-game-hack PDF link annotation
    • https://pustaka.stie-pembangunan.ac.id/repository/how-to-combine-videos-on-tiktok-free_GM835599320.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/robux-hack-real-no-survey_GM431946152.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/get-robux-now_GM431946152.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/how-to-get-r-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/roblox-hack-ios_GM431946152.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/10m-free-robux-daily_GM431946152.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/roblox-legendary-swords-rpg-hack_GM431946152.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/free-popular-roblox-survey_GM431946152.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/coin-master-unlimited-spin-hack-apk_GM406889139.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/jailbreak-roblox-free-money_GM431946152.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/new-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/google-moon-active_GM406889139.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/games-like-coin-master-for-free_GM406889139.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/minecraft-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/roblox-apk-hack_GM431946152.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/free-robux-app-android_GM431946152.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/roblox-free-cookie-list_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_off00003155.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3155 22744 bytes
SHA-256: f42fcb24d033a2bbac53a45e5b338d8903c777bb7dbb1812a40feeedd829d0a8
font_01_sfnt_off00006473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6473 18756 bytes
SHA-256: 5ddeee92078a18a9ce538fcc67bef45dcef09506aba632bc2469329d8d7e1d8a

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