Malicious PDF — malware analysis report

Static analysis result for SHA-256 d33dd39e8336ab8f…

MALICIOUS

PDF

35.1 KB Created: 2021-07-04 10:28:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ea17ee15f42590cebb86537259e9bbf6 SHA-1: a49f1c8bd2fa3688696a8bb51af2a1f145ae034d SHA-256: d33dd39e8336ab8f019337846a6449cdb0e7d2821dba492288d13b8ad80e667b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for game hacks and free currency, directing users to malicious redirectors. The primary redirector URL is http://netcdn.tw/app/406889139/how-can-i-get-free-coinsn-coin-master-game-hack. This document likely serves as a lure to download further malicious content, potentially through the embedded links to other PDFs hosted on opac.library.uib.ac.id.

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/how-can-i-get-free-coinsn-coin-master-game-hack In PDF document text
    • http://opac.library.uib.ac.id/repository/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/minecraft-app-store-free_GM479516143.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/minecraft-hacks-pc_GM479516143.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/hacks-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/coin-master-daily-spin-link_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/pubg-uc-zip_GM1330123889.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/coin-master-hack-online-no-human-verification_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/how-to-get-free-unlimited-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/coin-master-latest-version-hack_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/unlimited-robux-2021_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/free-minecraft-website_GM479516143.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/coin-master-redeem-code-free_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/pubg-uc-center_GM1330123889.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/roblox-games-com-free_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/coin-master-mod-version-free-download-ios_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/how-to-hack-any-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3309 23064 bytes
SHA-256: 51cb03cbde379bc9075a5036bed73ff85bdbbf43ac6e17fa2cff1fa5c91ffe38
font_01_sfnt_off000066ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66EE 18164 bytes
SHA-256: fa47a7a0c7c4ec8ea8fe3afb2e8d91ccfaa7851461a3b0a3b74041f8effbb9c2

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