Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d72462e77be63fe…

MALICIOUS

PDF

36.0 KB Created: 2021-07-04 13:11:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: cf973afdd98867e425f00258d2ec0e03 SHA-1: a9802c8f6cefd9914cb210bf2b03557499f28006 SHA-256: 4d72462e77be63fe2cd4bcdf9f0353c2af7a3eb7edf6d99b006bed26a9c20025
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for game hacks and free currency, directing users to a known malicious redirector. The embedded URL http://netcdn.tw/app/431946152/free-robux-without-human-verification-2021-game-hack is associated with malicious redirector infrastructure. The document's content and structure strongly suggest a phishing or scam attempt designed to lead users to potentially harmful websites.

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-robux-without-human-verification-2021-game-hack In PDF document text
    • https://library.institutpendidikan.ac.id/repository/roblox-apoc-rising-skin-giver-hack_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/emporor-roblox-hack_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/coin-master-hack-2021-app-download_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/coin-master-connection-lost-hack_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/hack-coin-master-8-ball-pool_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/login-to-tiktok-free_GM835599320.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/basic-roblox-lua-programming-book-free_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/coin-master-free-spins-hack-ios_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/roblox-devil_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/coin-master-spin-rewards_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/game-give-free-robux_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/how-to-get-frozen-hair-for-free-roblox_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/minecraft-xray-hack_GM479516143.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/roblox-welcome-to-the-neighborhood-of-robloxia-v4-free_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/roblox-robux-generator-tool_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/robux-hack-me_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-minecraft-skins-xbox-one_GM479516143.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_off000033a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33A3 22204 bytes
SHA-256: bc49e87e9362b8702e7a5c1587e0f57b3993b0a6572c7a2eb70813b2b6caa71a
font_01_sfnt_off000064ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64CE 20100 bytes
SHA-256: 224766b145fea2ee77d6018406834ac88e8b97acd6b6511a2b41135dc58ea70f

Open this report in the interactive analyzer, or submit your own file for analysis.