Malicious PDF — malware analysis report

Static analysis result for SHA-256 490ec3ff027e00dd…

MALICIOUS

PDF

35.3 KB Created: 2021-07-05 05:12:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0f0dd753f5a0dadc9f656f5604b82b01 SHA-1: 030ad915096c73f937966a82d7e60b24f82a991f SHA-256: 490ec3ff027e00dd1ef0f02bd72d2c78064380d358e4e64f749c60af46b8799a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and free currency to trick users into clicking a link. The primary link, http://netcdn.tw/app/406889139/free-coins-coin-master-haktuts-game-hack, is identified as a malicious redirector. While no scripts were extracted, the document's structure and embedded URLs suggest a phishing or scam attempt, likely leading to further malware download or credential harvesting.

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/406889139/free-coins-coin-master-haktuts-game-hack In PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/free-spins-for-coin-masters_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-to-get-free-shirts-on-roblox_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/food-empire-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-to-get-robux-easily-and-free_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/cooo-tener-un-pokemon-roblox-free-pokemon-brick-bronze-beta_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-robux-app-for-roblox_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-to-setup-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-to-cheat-in-rotom-on-prokect-pokemon-roblox_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/best-sites-for-free-robux_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-daily-gift-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/como-hackear-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/give-me-robux_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/roblox-tix-robux-hack-download_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/give-away-game-in-roblox-to-get-free-robux_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
stream_002_off00003536.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3536 22432 bytes
SHA-256: 116529b5b64098d8ac1b551f72e9fc1590db85e8d479df498d1cf2d6abca1d4f
font_01_sfnt_off00006751.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6751 18308 bytes
SHA-256: c10b2ce2116ce86515ac537777e6aa729f43e458fc79ee6425be9f5ece8a010a

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