Malicious PDF — malware analysis report

Static analysis result for SHA-256 170b5dd7de01075d…

MALICIOUS

PDF

35.0 KB Created: 2021-06-18 06:44:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 4ad48c4c4a3193dc8a52e9b38016bd94 SHA-1: 8273b64d8e89c56d6a991bcda617f9b54f4e7016 SHA-256: 170b5dd7de01075dae4939c824eb2f05bd33901d7985f339a7acafd3f7710f60
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, masquerading as free game hacks or generators. The primary redirector URL is http://netcdn.co/app/431946152/free-item-roblox-2021-game-hack. The document body and embedded URLs suggest a lure for obtaining in-game currency or items for games like Roblox and Coin Master. No scripts were extracted, but the presence of malicious redirectors and the lure indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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.co/app/431946152/free-item-roblox-2021-game-hack In PDF document text
    • http://elibrary.perludem.org/repository/free-roblox-glasses_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/redline-cheat-roblox-download_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-heaven-free-spins-link_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/hack-coin-master-pc_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-free-daily-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-roblox-accounts-2021-with-pin_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-free-stuff-links_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-spin-link-today-16-11-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/music-hacker-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-change-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-free-robux-obby_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/minecraft-free-edition_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-hack-mocap-dancing-in-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/krnl-download_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/i-got-hacked-playing-roblox-in-real-life_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-scythe-script-hack_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-hack-download-android_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
font_00_sfnt_off000031ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31EC 21964 bytes
SHA-256: 006e249503a3eb6dff2ae2d287a2a64983bdf175bb7215f6d7db62402324b772
font_01_sfnt_off0000627a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x627A 19416 bytes
SHA-256: 58f7c7864fb8abb523be830e5b229bac70cf55ac1539693ab66bc362e010fcee

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