Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fcf1b24a3c7ca56…

MALICIOUS

PDF

43.1 KB Created: 2021-06-03 22:17:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 5f4b15673451e95c0ba344b7c3ab8186 SHA-1: 5813a14276eb62b1acc025f32eb2b5dae70c54cf SHA-256: 8fcf1b24a3c7ca561b5e6c8e18cbdf15cff129904b30a00daec4df170db7dd37
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 trick users into clicking a link. The link leads to a website offering game hacks and generators, a common social engineering tactic. While no scripts were directly extracted, the PDF structure and embedded links suggest it is designed to redirect users to malicious sites, potentially for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

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.online/app/835599320/tiktok-free-wala-game-hack PDF link annotation
    • http://lib.untad.ac.id/repository/getrobux-come_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/is-roblox-free-on-the-computer_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-free-items_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-free-spins-generator-no-verification_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/100-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/hack-coin-master-online_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-play-minecraft-online-for-free_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/minecraft-windows-10-free-with-java_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-do-you-earn-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-cheat-codes-free_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-devil_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-2021-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-roblox-outfits-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/roblox-com-redeem_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/links-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-daily-free-spins-link-facebook_GM406889139.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_off00004d24.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D24 24912 bytes
SHA-256: 23fa52f3b9ab2319c52cecaccd32e3348f67d0640aebd68fc739b23955b76c5f
font_01_sfnt_off000086c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86C9 17956 bytes
SHA-256: 898cd4fc8992ce22b3c58be963391f4a86278fab071865ff91fd5926642f9aba

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