Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7436c5632e06bbf…

MALICIOUS

PDF

48.4 KB Created: 2021-06-04 02:35:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 3ff8c4d2da31f27737f6425599500ebf SHA-1: 15ac1482b2dcb9a74bc5928c38db9bf3f4afe4c0 SHA-256: e7436c5632e06bbf4dc31fe7df32ea9ed5c74a00801b5cbccb416708d0ff5cdb
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/431946152/how-to-get-free-robux-with-no-verification-game-hack PDF link annotation
    • http://elibrary.perludem.org/repository/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/getrobux-now_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/robux-no-survey_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-free-spins-heaven_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/minecraft-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-reddit_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/is-minecraft-free-on-pc_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/como-hackear-el-juego-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-spins-link-download-apk_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/earn-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/pokemon-go-free-accounts-level-40_GM1094591345.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-free-daily-spins-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005084.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5084 26604 bytes
SHA-256: fbb6624c79c09041e74401cda75351dbab1d1aafdfa617e59abb45276256716f
font_01_sfnt_off00008e0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E0F 2824 bytes
SHA-256: 1d0cb1023eaa225682b8e7a2c8df4e4c96545ba7eedaf3d9844e51183e9ca189
font_02_sfnt_off000097bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97BC 19128 bytes
SHA-256: acb72b37f9b0a7ac0fa23716fb81d4af9379ab539551c05381b29cd372bdbe33

Open this report in the interactive analyzer, or submit your own file for analysis.