Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd3ac8ff5976331c…

MALICIOUS

PDF

34.6 KB Created: 2021-07-05 06:07:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b9523e154353a912acbd6769f44ca3a7 SHA-1: c88fca536b6bcbedf4ed92617283430b530ecfb7 SHA-256: fd3ac8ff5976331ceb0c90f24048c80966cfcaa50e38cae9eb84a05e0c04c7b7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as "free game hacks" or generators. The document body and heuristics indicate a lure to download or access content from these malicious URLs. The primary malicious URL identified is http://netcdn.tw/app/479516143/minecraft-java-edition-free-game-hack, which is flagged as a malicious redirector.

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/479516143/minecraft-java-edition-free-game-hack In PDF document text
    • http://library.stieyapan.ac.id//repository/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/earn-robux-today_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-villages_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-cheat_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-lumber-tycoon-2-free-ticket_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/working-free-robux-obbys_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-watch-ads-for-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/pop-slots-free-vegas-casino-slots-machine-game-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-minecraft-skins-pc_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/100-real-robux-hack_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-promo-code-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/all-links-for-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-hack-spins_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-free-codes_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-home_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/february-2021-robux-cheats_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-robux-safe_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/minecraft-games-free-download_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/robux-generator-without-human-verification-2021_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_off00003383.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3383 21956 bytes
SHA-256: 26ec3cabd87050e29f7508af17ca14b3e868768157a06e819e905894840cc2bb
font_01_sfnt_off00006412.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6412 18452 bytes
SHA-256: c88fc963111c99bd76411e48cc5f7a93ca1ac40d038cb8251833f774ecd296b3

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