Malicious PDF — malware analysis report

Static analysis result for SHA-256 87dc7bcea2a5f3a7…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 06:47:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 2e8e7543cbe004819e299930e473c8a0 SHA-1: 15b6748a5d70d83bf7e449d22619071e2cd66145 SHA-256: 87dc7bcea2a5f3a7cf1d462c028464ef1f02cf52963793d58ac22997377d23d2
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a lure related to game hacks and free currency, strongly suggesting a phishing or scam attempt. The primary URL, http://netcdn.tw/app/406889139/coin-master-free-foxy-food-game-hack, is directly linked to a 'game hack' heuristic. While no scripts were explicitly extracted, the nature of the lures and embedded URLs points towards a malicious intent, likely to redirect users to a site that either hosts malware or attempts to harvest credentials.

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-free-foxy-food-game-hack PDF link annotation
    • https://library.uigm.ac.id/repository/join-builders-club-roblox-free_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-tiktok-followers-no-survey_GM835599320.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-the-conquerors-3-money-hack_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-promo-code-roblox-2021_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-free-clothes-download_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-online-hack-tool-no-survey_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-building-games-on-roblox_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-hack-apk-android-oyun-club_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/cone-master_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/get-robux-paid-access-games-free_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-change-roblox-username-for-free_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-free-glasses_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/is-minecraft-java-free_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-robux-not-fake-no-verification_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-free-link-2021_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-get-robux-for-free-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-minecraft-skin-packs_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-roblox-faction-defense-level-code_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-get-free-roebucks-in-roblox-xbox-one_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
font_00_sfnt_off00003173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3173 22644 bytes
SHA-256: 7b7dc75dde2ca6c4cb3af57a10a567dd208ec9d878c3af909729058d940a41f6
font_01_sfnt_off00006408.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6408 18564 bytes
SHA-256: 4e08a9fe38938dbf04ccb9f1ad2aa5bec9d413f8e0a851b44050773223700f32

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