Malicious PDF — malware analysis report

Static analysis result for SHA-256 687b925fbb4abfcb…

MALICIOUS

PDF

33.6 KB Created: 2021-07-03 21:02:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c4d3309c82afa3016393f7ff2c86b398 SHA-1: 28452e1e5de3bded1b31cd4655f5ec8affddc42d SHA-256: 687b925fbb4abfcbae233b31249dc84191ed802cc04e02aa86ebb22a14d8a1b1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, disguised as game hacks and generators. The primary lure URL is http://netcdn.tw/app/479516143/is-minecraft-java-free-game-hack, which is associated with malicious redirector infrastructure. The document body and embedded URLs suggest a social engineering attempt to trick users into visiting these malicious sites, likely for further malware delivery or phishing.

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/is-minecraft-java-free-game-hack In PDF document text
    • https://perpustakaan.itda.ac.id/repository/how-to-get-cheat-scripts-in-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/minecraft-for-ipad-free_GM479516143.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/minecraft-anarchy-server-no-hacks_GM479516143.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-robux-scam_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/roblox-slaying-simulator-hack-v3rmillion_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/minecraft-mod-menu_GM479516143.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/how-to-get-robot-animation-for-free-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/freed-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-free-fire_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/new-not-center-roblox-hack_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/claimrobux-net_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/get-free-robux-game_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/roblox-sex-game-free-download_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-robux-2021-february_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-spin-today-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/roblox-secret-forum-hack_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/roblox-adopt-me-free-pets_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/roblox-how-to-sign-up-on-cheat-buddys-website_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_off00002fe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FE9 22356 bytes
SHA-256: 8b35c694657914b556e2771c4edc3198694a9e6f6b420c41187b44ef0b2debb8
font_01_sfnt_off00006125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6125 18136 bytes
SHA-256: 9547b58ce6c3755cd95535045daa19e5ef5b9903e70eab3289755a1c0611a372

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