Malicious PDF — malware analysis report

Static analysis result for SHA-256 2af5ac82e26530d9…

MALICIOUS

PDF

49.0 KB Created: 2021-06-11 03:05:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a535078f1e8edd95081db0cf959f3c95 SHA-1: 70623d42db7276d58a5a65af9b78ea128c9c1871 SHA-256: 2af5ac82e26530d9149414855d47a3cdd8b318d3e3817899cc10fa56777f57a4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as "free generators" or "game hacks" for popular games. The primary malicious link identified is https://netcdn.tw/app/431946152/free-things-in-roblox-2021-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious redirector workflow designed to lure users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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 https://netcdn.tw/app/431946152/free-things-in-roblox-2021-game-hack In PDF document text
    • http://elibrary.perludem.org//repository/minecraft-pe-hacked-client-download_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/minecraft-story-mode-free_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-link-app_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/minecraft-the-complete-handbook-collection_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-spins-coin-master-ios-links_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-cheat-on-roblox-games_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-3d-online-games-like-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/what-is-wurst_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-32-mod-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/minecraft-java-edition-free-trial_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/pastebin-roblox-robux-free_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/abd-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/cute-free-roblox-clothes_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/como-hackear-coin-master-sin-verificacion-humana_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000556f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x556F 24992 bytes
SHA-256: 38cdffe1b0cfc6332fd07c80ad4302a2a8874abc6d3177b39c1d3e0dc678221c
font_01_sfnt_off00008dd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DD6 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00009ae8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AE8 18924 bytes
SHA-256: 84e736985328b9a8f602a86e598fdd2ce93922f8e5d3a9fbfd65459b2ed7dd4f