Malicious PDF — malware analysis report

Static analysis result for SHA-256 b259449e2d498a5c…

MALICIOUS

PDF

46.3 KB Created: 2021-05-13 23:38:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 7bb31cae6a9dee76ec15a192fc28e046 SHA-1: 4a8a16bc8627d6e9051b1310223b36e9fbc6964a SHA-256: b259449e2d498a5cd0cc013151fe21e93271808f7c2bac063ac19478ceb7e502
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector domains, masquerading as generators for free in-game currency and items. The primary malicious link identified is 'https://netcdn.xyz/app/406889139/coin-master-free-spins-facebook-game-hack', which is flagged as a known malicious redirector. The document's structure and embedded URLs strongly suggest a phishing or scam attempt designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8696

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 https://netcdn.xyz/app/406889139/coin-master-free-spins-facebook-game-hack In PDF document text
    • https://ponturipariuri.pro/ckfinder/userfiles/files/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
    • https://ponturipariuri.pro/ckfinder/userfiles/files/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://ponturipariuri.pro/ckfinder/userfiles/files/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://ponturipariuri.pro/ckfinder/userfiles/files/how-to-get-free-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • https://ponturipariuri.pro/ckfinder/userfiles/files/cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • https://ponturipariuri.pro/ckfinder/userfiles/files/daily-coin-master-free-spin-apk_GM406889139.pdfIn PDF document text
    • https://ponturipariuri.pro/ckfinder/userfiles/files/how-to-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • https://ponturipariuri.pro/ckfinder/userfiles/files/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • https://ponturipariuri.pro/ckfinder/userfiles/files/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • https://ponturipariuri.pro/ckfinder/userfiles/files/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://ponturipariuri.pro/ckfinder/userfiles/files/free-robux-place_GM431946152.pdfIn PDF document text
    • https://ponturipariuri.pro/ckfinder/userfiles/files/minecraft-xray-hack_GM479516143.pdfIn PDF document text
    • https://ponturipariuri.pro/ckfinder/userfiles/files/coin-master-free-food_GM406889139.pdfIn PDF document text
    • https://ponturipariuri.pro/ckfinder/userfiles/files/free-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://ponturipariuri.pro/ckfinder/userfiles/files/coin-master-tiradas-gratis_GM406889139.pdfIn PDF document text
    • https://ponturipariuri.pro/ckfinder/userfiles/files/safe-hack-for-coin-master-android_GM406889139.pdfIn PDF document text
    • https://ponturipariuri.pro/ckfinder/userfiles/files/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • https://ponturipariuri.pro/ckfinder/userfiles/files/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • https://ponturipariuri.pro/ckfinder/userfiles/files/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://ponturipariuri.pro/ckfinder/userfiles/files/free-headless-head-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004e0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E0F 25648 bytes
SHA-256: bdb3df2505f5aa412d2e1b37e4e95b90c2e347b492dd818b0257dd5333ceae0b
font_01_sfnt_off00008915.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8915 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off000092c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92C7 18212 bytes
SHA-256: a7d0484bdc545634c9b46f4dcbf794c30064c3aaaf3cdd537b213ac19f08a95c

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