Malicious PDF — malware analysis report

Static analysis result for SHA-256 abbbc44c9ef42f87…

MALICIOUS

PDF

36.4 KB Created: 2021-07-01 09:34:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d99c2e603a4188d0a979f6b9e3170fff SHA-1: 69d633891b35c204f2f1b955c6495fbc57ed5cac SHA-256: abbbc44c9ef42f8777eefc5d8cf046d08c75bfa25f1a73e09170abdb4c392ad7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to malicious infrastructure, masquerading as free game hacks and currency generators. The primary lure URL is http://netcdn.co/app/431946152/free-codes-on-roblox-mining-simulator-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a phishing or social engineering attack aimed at redirecting users to potentially harmful sites.

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-codes-on-roblox-mining-simulator-game-hack In PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/2021-free-robux-hacks_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/roblox-tower-defense-simulator-hacks_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/how-to-get-free-knives-in-mm2-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-minecraft-hosting_GM479516143.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/roblox-supreme-t-shirt-free_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/easy-way-to-get-robux_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/coin-master-free-spins-hack-link_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/coin-master-free-spins-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/how-to-hack-in-roblox-assassin-2021-febuary_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/online-coin-master-hack-here_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/roblox-apocalypse-rising-vehicle-speed-hack_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-robux-clicker_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/cute-girl-avatar-on-roblox-copyable-free_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/prokjs-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/dl-roblox-hack-scripts-pastebin_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/roblox-script-executor-free-dd_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/how-to-hack-roblox-accounts-abandon_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off00003449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3449 22908 bytes
SHA-256: a7f59c456676f2fec4445a4903ae92567eea8fa829f75979aa125da0df73e0f3
font_01_sfnt_off000067b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67B9 19644 bytes
SHA-256: 797b9a04d65283119dc48bfec56d3a6130c66e7e6703f5dacdbbb865bf974f8b

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