Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f827b965d6f8cbb…

MALICIOUS

PDF

47.9 KB Created: 2021-06-09 13:30:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 4f30c7d037eadc45a184a33c78f9aa12 SHA-1: 648e45b1015b398a2b14165c5a516888fdb11ca2 SHA-256: 7f827b965d6f8cbbca61b7c0a85b2cfa3bdf7587f7e081de0824a357b7b0a758
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document employs a fake CAPTCHA lure to deceive users into clicking a link, which is identified as a game hack generator. This malicious link, https://netcdn.tw/app/431946152/robux-gratis-con-cheat-engine-game-hack, likely serves as a gateway to download further malicious content. The document's structure and the presence of multiple suspicious URLs indicate a phishing or malware distribution attempt.

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/robux-gratis-con-cheat-engine-game-hack PDF link annotation
    • http://stitqi.ac.id/website/repository/coinmaster-spin-ml-free_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/android-coin-master-3433-apk-hack_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/coin-master-hack-ios_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/free-coin-spin-daily-link-net_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/free-roblox-script-executor_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/free-robux-app_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/how-to-get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/coin-master-hack-tool-download_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/free-running-in-parkour-roblox_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/tiktok-free-nose-job_GM835599320.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/how-to-spawn-hack-in-apocalypse-rising-roblox-2021_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/minecraft-java-edition-download-free_GM479516143.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/i-robux_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/www-robux-cheat-us_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/how-to-get-free-hats-on-roblox_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
stream_004_off000055ce.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x55CE 28796 bytes
SHA-256: 678cff1a26ceba68d32620c40c8529458b06f732da27a3e13becab14a2ee081e
font_01_sfnt_off00009793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9793 18756 bytes
SHA-256: b8b341966d40f2f387122284e38e5360b51cbaa3f2a8dfd188e0e9544042c007

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