Malicious PDF — malware analysis report

Static analysis result for SHA-256 f92c5a96d70dd4b9…

MALICIOUS

PDF

34.8 KB Created: 2021-07-05 12:01:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4a1065d4cd168935ddfa5348d003955a SHA-1: 0277f1a1f69196be530b49c76ab173092d8aa366 SHA-256: f92c5a96d70dd4b95f3c7b94a036590e0820ebc300eb654b873077e184184236
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirector infrastructure, specifically promoting 'free Robux' or game hacks. The primary lure URL is http://netcdn.tw/app/431946152/how-to-get-free-robux-website-game-hack. This suggests the document is designed to trick users into visiting malicious sites, likely for further exploitation or credential harvesting.

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.tw/app/431946152/how-to-get-free-robux-website-game-hack In PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/money-hack-ultimate-driving-roblox-2021_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/roblox-november-2021-hacks_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/roblox-xbox-one-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/coin-master-new-link-free-spin_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-robux-no-inspection_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/hacks-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/minecraft-tiktok-hacks_GM479516143.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/free-bling-bling-card-coin-master_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/com-roblox_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-to-use-old-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/how-to-get-free-clothes-on-roblox-on-ipad_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/cheating-explioting-in-the-condo-roblox_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/lazyblox-com-free-robux_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_off00003193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3193 21940 bytes
SHA-256: a46216b205fab6892d598f86f08ddfbf39df85cb3f685963477906d6761b4fdb
font_01_sfnt_off000061f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61F5 19304 bytes
SHA-256: c93debd830b422eae21ec10a608c2d09d6fed7207bb4c45cee900aa0b721bbbd