Malicious PDF — malware analysis report

Static analysis result for SHA-256 c24627bfc59459f7…

MALICIOUS

PDF

45.6 KB Created: 2021-06-09 07:26:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 26680358fdcb1947684ebbaec68ce34e SHA-1: 8ca007da52a128c25f89d67e9af12aacf7852241 SHA-256: c24627bfc59459f7980ca4dba6ca1f4c933b33de01acfd791e0e0688531064e8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirectors and external resources, masquerading as free game hacks or generators. The primary malicious URL identified is https://netcdn.tw/app/431946152/free-robux-no-human-verification-2021-real-game-hack, which is flagged as malicious infrastructure. The document body and embedded links suggest a phishing or scam attempt to lure users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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-robux-no-human-verification-2021-real-game-hack In PDF document text
    • http://elibrary.perludem.org/repository/roblox-gift-card-free-codes_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/pubg-uc-not-received_GM1330123889.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/roblox-free-models_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-robux-online-hack-_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-spins-on-coin-master-cheat_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-god-simulator-hack-gui_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/pokemon-go-free-unblocked_GM1094591345.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-34-6-hack_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-use-wurst_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/can-you-still-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/pubg-uc-whatsapp-group_GM1330123889.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/blox-rewards_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-hack-uk_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/robloxbux-us-generator_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/guava-juice-robux-hack_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_off000052d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52D0 24960 bytes
SHA-256: ef506132591700b5c827f41bbea56c97e262228bc7553534fedb2483aa69eb35
font_01_sfnt_off00008cb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CB6 19336 bytes
SHA-256: 496d6cc24947cda77fdd361dc6fa4d816139892bf3bdeff9c4e3ca46cda57c3e

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