Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8008bb67d0ca81d…

MALICIOUS

PDF

34.1 KB Created: 2021-07-03 11:24:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8a6f61b7355d2e16e456e9cf4df2198f SHA-1: 99f70f71f7f6736c09fd61aac83619643ac303a4 SHA-256: c8008bb67d0ca81deb13f1442be49ef353ed5331c3f24b86cd2a3e02455408ab
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on what appears to be a game hack or generator. The primary link, http://netcdn.tw/app/406889139/link-for-free-spins-on-coin-master-game-hack, is identified as a malicious redirector. The document body and embedded URLs suggest a phishing attempt related to popular online games, likely aiming to lead users to credential harvesting or malware download sites.

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/link-for-free-spins-on-coin-master-game-hack In PDF document text
    • https://ciudadata.ec/images/ckfinder/files/free-robux-ohne-handynummer-2021_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/roblox-rape_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/free-robux-apple_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/roblox-hack-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/escape-room-roblox-cheats-enchanted-forest-secret-password_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/hacks-para-roblox_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/hack-para-roblox-2021-pc_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/roblox-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/free-spins-coin-master-generator_GM406889139.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/how-to-hack-any-roblox-account-dec-2021_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/youtube-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/hack-coin-master-dzooka_GM406889139.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/android-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/coin-master-free-card-link-today_GM406889139.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/roblox-taxi-simulator-give-all-cars-hack_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/coin-master-hack-tool-v1-9-pc_GM406889139.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/rbl-gg-free-robux_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_off00002f25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F25 22968 bytes
SHA-256: 31a900ad5de1b16d1dbda4e4ea80c40ad6f3523a84342b39f3d1c0671d4163a3
font_01_sfnt_off0000628e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x628E 18344 bytes
SHA-256: f56b0ea85f0f4ceaa4b3226630b5e27c33b435ed9466ab3582cda34df5208c0a

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