Malicious PDF — malware analysis report

Static analysis result for SHA-256 5503764122d68ece…

MALICIOUS

PDF

48.1 KB Created: 2021-06-09 04:51:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 8e3ca8ad0a4e7b6354f0d1f2a399d21b SHA-1: ced45d8219e9c9e728f5e4781171ac867e7b3f92 SHA-256: 5503764122d68ece6d47374d7f84d0ff1b9c96c7306935a64dedaa4bed73cbef
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a fake CAPTCHA lure to deceive users into clicking links related to game hacks and free Robux. The embedded links, such as https://netcdn.tw/app/431946152/do-roblox-employees-get-free-robux-game-hack, likely serve as a distribution point for malicious payloads. The document's structure and the nature of the lures strongly suggest an attempt to exploit user interest in game cheats for malicious purposes, aligning with common phishing and malware delivery tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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 https://netcdn.tw/app/431946152/do-roblox-employees-get-free-robux-game-hack PDF link annotation
    • http://sttlets.education/senayan//repository/coin-master-free-coins-spins_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/coin-master-free-spins-link-2021-download_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/how-to-hack-coin-master-android_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/200-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/coin-master-hack-apk-ios-download_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/robux-now_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/how-to-hack-a-minecraft-account_GM479516143.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/free-roblox-girl-hair-not-a-model_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/hack-coin-master-1_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/coin-master-cards-for-free_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/free-robux-android_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/get-free-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/coin-master-jackpot-hack_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/roblox-com-redeem_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/how-to-change-your-name-on-roblox-for-free_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_off000054c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54C6 29560 bytes
SHA-256: 3eaa116a5799ad02964ae42d24628ff272e9657f8fa0c9f4b3cfda8e069e139b
font_01_sfnt_off000097b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97B4 18976 bytes
SHA-256: 93ba0a0468d4d6d0533e6ce9a2ecc41879767448adaca95061b64295325bf796

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