Malicious PDF — malware analysis report

Static analysis result for SHA-256 b24e7e343b10a0a9…

MALICIOUS

PDF

34.6 KB Created: 2021-07-07 08:52:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 192102c03d76226f30dfab3fbee84e5a SHA-1: 36c5d92cab4f63a3336449b027865cf3055e9b22 SHA-256: b24e7e343b10a0a98c47692257c8e17c63c4e93b8c8db7562ebc22ef3019cb80
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to a redirector hosted on 'netcdn.tw', which is flagged as malicious. The document body and embedded links promote 'Coin Master' hacks and free spins, a common lure for phishing and malware distribution. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

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/coin-master-heaven-free-spins-link-2021-today-game-hack In PDF document text
    • http://perpus.unik-kediri.ac.id/repository/coin-master-free-spins-2021-link_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/free-clothes-for-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/coin-master-connection-lost-hack_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/freerubux_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/dayz-og-roblox-cheat-codes_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/coin-master-hack-2021-apk_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/free-robux-pastebin-no-subscribe-2021_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/roblox-anti-cheat-bypass_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/coin-master-hack-mod-apk-download_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/coin-master-daily-spin-link_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/robux-hack-download-2021_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/free-robux-cards_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/free-spin-link-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/minecraft-marketplace-free_GM479516143.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unik-kediri.ac.id/repository/free-robux-group_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_off000030fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30FE 21984 bytes
SHA-256: 3a00f7723823949698ffb472f462d774506ed2388e7e889a963b0d1ed131b17f
font_01_sfnt_off00006177.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6177 19212 bytes
SHA-256: 9018d35b6adb957a15f04eb7ee50f2e08deef9d1fc1ef5103f9c1835f7b196b3

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