Malicious PDF — malware analysis report

Static analysis result for SHA-256 05a019b88064f735…

MALICIOUS

PDF

35.6 KB Created: 2021-07-04 19:45:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 1406ae3fea87b969ee758c0f17a95bc2 SHA-1: 4a10eb36409c8ec3864c93e1b14efb0e26648069 SHA-256: 05a019b88064f735eb92fa34a80837585c69b780d0532a417aa55899deaf1996
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, with a primary focus on luring users with 'game hack' or 'free generator' themes related to Roblox. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly indicates this malicious intent. The document's content and structure suggest it is designed to trick users into clicking these links, which likely lead to malware downloads or phishing sites. No scripts were extracted, but the PDF's nature and embedded links are sufficient to infer a malicious workflow.

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/431946152/robux-website-game-hack PDF link annotation
    • http://www.elibrary.perludem.org/repository/roblox-free-draw_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-speed-hack-2021-new-code_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-free-robux-with-a-fake-card_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/hack-de-allah-akabar-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-give-away-live_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-change-your-speed-no-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-codes-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/lucky-blocks-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/hack-money-for-roblox-lumber-tycon_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-spins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-ways-to-record-roblox-with-voice_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-2021-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-roblox-games-to-play-now_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/robux-generators-that-actually-work_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/hack-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/hacks-para-roblox-jailbreak-2021-descargar_GM431946152.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_off00003368.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3368 22732 bytes
SHA-256: cb5dcc22ba51ef8a676da7054cf05681ae28ee8dafca32d7ce971d96259789a2
font_01_sfnt_off0000665d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x665D 18976 bytes
SHA-256: 2be0fca1477d06bba603c393dad1761654b53599fc718925d7eece702ba6c269

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