Malicious PDF — malware analysis report

Static analysis result for SHA-256 50de62bb149a0596…

MALICIOUS

PDF

36.2 KB Created: 2021-07-04 19:35:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 9df12fc8103d11e57bd36d878d344cb9 SHA-1: 873f95eb542a133ece2994bc72f85e17940f1090 SHA-256: 50de62bb149a0596f9be8dad27e55a58665204e0abfcacdce983ef746db7c37f
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 0.9980

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 http://netcdn.tw/app/479516143/free-mojang-account-with-minecraft-game-hack PDF link annotation
    • http://www.elibrary.perludem.org/repository/how-to-speed-hack-las-vegas-on-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-free-spins-2-5-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-just-for-singing-up_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/is-coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/easy-way-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-bloxburg-free-money_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-creepily-hack-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/earn-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-free-exploit-no-virus_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/i-got-this-tshirt-for-free-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/comandos-hack-para-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-be-hacker-on-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-hack-apk-with-fb-login_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-roblox-barbie-tips_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/mcpe-hack-client_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/get-free-tiktok-likes_GM835599320.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_off000036dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36DD 22808 bytes
SHA-256: 4879997d0e5675922a6ed89764c9c5b7d863451d6708dafe2ba94960cc72ff5d
font_01_sfnt_off000069e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69E2 18688 bytes
SHA-256: 60143c81e88e14cdfb7631f3b4f61d617c046054e7601d01d98adb150323207f

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