Malicious PDF — malware analysis report

Static analysis result for SHA-256 14227e164761cda3…

MALICIOUS

PDF

35.5 KB Created: 2021-07-02 09:03:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 55e710c1e640340996e2d44518e0f58a SHA-1: b3186cdf59130640c77ff09929f1c3c1877c2059 SHA-256: 14227e164761cda3f5817ffdf1255673548f396c5e88404e0e99a83e0f0e7946
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with a critical heuristic identifying one as a malicious redirector. The document body and heuristics indicate the lure is for a 'game hack' or 'generator', specifically mentioning 'Coin Master Hack Injection'. The primary malicious URL identified is http://netcdn.co/app/406889139/coin-master-hack-injection-game-hack, which is likely used to deliver a second-stage payload or lead the user to a phishing site.

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.co/app/406889139/coin-master-hack-injection-game-hack In PDF document text
    • https://www.advancissurgical.com/uploads/files/files/roblox-hack-khol-admin-house_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-obc-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/aimbot-exe-roblox_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/coin-master-free-spins-that-really_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/hack-coin-master-ios-download_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/coin-master-how-to-get-free-pet-food_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/bird-simulator-roblox-coin-cheat_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/coin-master-game-hack-apk_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/roblox-free-clothes-codes_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/cute-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/robux-cheats-com_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/coin-master-daily-gift-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/this-you-cna-do-with-cheat-engine-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-roblox-premium_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/tiktok-free-view-iphone-wallpaper_GM835599320.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-robux-promo-codes-2021_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_off0000350b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x350B 23028 bytes
SHA-256: 76b0fad0d7fa721e9371e72b54d76fea79983cb03344278fdead4aa27d63b116
font_01_sfnt_off00006877.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6877 18192 bytes
SHA-256: b1ce4aad51eab55aca347a921b79c2f8acd2a1fb99075b3acb5c5a3904d9a197

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