Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f1521540130a09a…

MALICIOUS

PDF

35.2 KB Created: 2021-07-03 14:37:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: bcb8355ce546fa8df52d083a1eed3420 SHA-1: 197359efb6fc7a20e720cf5d725639e2be4f5202 SHA-256: 9f1521540130a09a47c5d6b503d3faa8dbcd75ac43b913dfd67f6f8e9d184503
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, masquerading as "free generator" or "game hack" lures. The primary malicious URL identified is http://netcdn.tw/app/431946152/free-roblox-templates-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a social engineering attempt to redirect users to potentially harmful content, likely for further exploitation or malware delivery.

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/free-roblox-templates-game-hack In PDF document text
    • http://library.unissula.ac.id/fk//repository/google-roblox-games_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-master-daily-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/without-pokemon-go-free-pokeballs_GM1094591345.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-how-to-get-free-robux-with-google-chrome_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/what-is-coin-master-app_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/quelqun-me-hack-sur-roblox_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/coin-master-hack-download-android_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/how-to-get-minecraft-for-free-on-ipad_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-free-spins-and-coins-today_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/actual-free-robux_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/free-admin-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/free-limiteds-roblox_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/minecraft-hack-ios_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-hacks-xray-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/mcpe-master-free-coins_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/tiktok-views-free_GM835599320.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/ww-free-robux-com_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/guide--coin-master-free-tips_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_off00003209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3209 22432 bytes
SHA-256: 16f7289352e0ce630ebbc95153e825b43e68fab7e4b7485da8a66fff10ed9f7b
font_01_sfnt_off0000642f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x642F 19188 bytes
SHA-256: 60804325b4b1ce91878f14603998b6c01265d5cbae0abd130df38de24cd9d06c

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