Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ef3a2c392886910…

MALICIOUS

PDF

45.9 KB Created: 2021-06-03 12:52:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 9f187556410b5be97f27458359327d97 SHA-1: 8ee1164312f4decebbbb021400012ac35c640567 SHA-256: 2ef3a2c3928869102744ba1a25cf88e8479db5d6ed9cd4c9cdc39e9d38cb70df
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. 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 0.9864

Heuristics 4

  • 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.
  • 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/406889139/coin-master-unlimited-spins-hack-game-hack PDF link annotation
    • http://elibrary.perludem.org//repository/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/get-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/pokemon-go-for-free-app_GM1094591345.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-do-i-earn-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-spin-and-coin-blogspot_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/real-robux-generator_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-robux-wheel_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/minecraft-free-no-virus_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-roblox-cards-pin-number_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-minecraft-windows-10-account_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-pe_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-spins-moonactive_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-32-android-mod-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/como-hack-coin-master_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_off000054f9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x54F9 25932 bytes
SHA-256: 94b27d1bd8818f014baa09d3f21862c2a3589dd5d6e9e340fcbf1e7043d9116a
font_01_sfnt_off00009030.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9030 18584 bytes
SHA-256: bff27dcdedd5af8a0d687a24d9b2ce7acea36a5c8901c6afee4cb29d8b6ebd85

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