Malicious PDF — malware analysis report

Static analysis result for SHA-256 df9deebf9dfc8cb9…

MALICIOUS

PDF

34.4 KB Created: 2021-07-04 00:02:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 7e87810d2cad6481b9bf6d4a1541e5e6 SHA-1: 4c4a499160b332d9b11d1e1a7efd53a4f57f0caa SHA-256: df9deebf9dfc8cb9ec0acece2b86ccf3328116dfe934d0a7d5ff592a451d8c71
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a critical heuristic firing for a game hack redirect lure, pointing to malicious infrastructure. The document body and embedded URLs reinforce this, advertising free spins and coins for games like Coin Master and Robux. The primary IOC is the redirector URL, which is likely used to serve further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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-free-spins-and-coins-game-hack In PDF document text
    • http://tasleemdubai.com/userfiles/files/how-to-get-free-robux-for-robloxroblox-corporation_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/roblox-generator_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/comment-installer-un-cheat-sur-roblox-bulble-gum_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/hack-somone-roblox_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/minecraft-114-4-download-free_GM479516143.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/coin-master-hack-mod-apk-unlimited-spin-download_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/free-robux-app_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/robux-hack-911-pastebin_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/today-free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/coin-master-hack-spin-generator_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/roblox-piano-hack_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/roblox-hack-prison-life-download_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/roblox-how-to-get-any-gamepass-free_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/easy-and-fast-quickest-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/get-free-gold-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/completed-coin-master-hack_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_off00003070.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3070 22800 bytes
SHA-256: 845f07686393df93d4811e67fdcac44a678672fa569351146293d404f552dfcd
font_01_sfnt_off000063b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63B6 18348 bytes
SHA-256: 3aa320ccb9cb7c087074e4ef079b33192d8e05703f275142029ef104db56ac85

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