Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e323af00ebc48c1…

MALICIOUS

PDF

47.9 KB Created: 2021-06-09 07:39:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-19
MD5: 13ef2ba94fd2cae73201472d99c346f9 SHA-1: 1c50b748047cd7fdb11ccf7872d97ae6029e627e SHA-256: 4e323af00ebc48c1f72ec576a80d47052677f5488d48e6f97d72a665a8868afc
220 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/how-to-get-free-vip-in-roblox-fashion-famous-game-hack In PDF document text
    • http://library.imz.or.id/repository/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/free-links-coin-master_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/free-robux-today_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/minecraft-free-exe_GM479516143.pdfIn PDF document text
    • http://library.imz.or.id/repository/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/coin-master-links-for-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/coin-master-hack-2021-ios-download_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/coin-master-home_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/free-spin-today-coin-master_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/free-spin-app-coin-master_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/roblox-play-as-guest-free_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/hack-card-collection-coin-master_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/roblox-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/coin-master-game-hack-version-download_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050f4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50F4 26052 bytes
SHA-256: 2d06d200ea8a31cc9bbd78b7dd20e49611911420156a21abe7b27ad185f45926
font_01_sfnt_off00008b25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B25 2956 bytes
SHA-256: bab8933fc39dc331bc4c1c904a82b1432ab2e02478fa0a59453c98c5c231da8d
font_02_sfnt_off00009545.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9545 19440 bytes
SHA-256: 3f399405cdf88a158522d0f5de1d98985270e83f831fb156e5e5dbe1d7151807

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