Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eacbc4396bc7e60…

MALICIOUS

PDF

34.0 KB Created: 2021-07-05 19:51:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 33521a6e8bedce3bb8c55a9548dd5eed SHA-1: 9e7d9a75156a5e806b2ebf4d01604efe6c83d7a4 SHA-256: 3eacbc4396bc7e60bc8ae5480fe69a5895c838d37dfd5f2bd0f50f7a1c48ce77
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising 'free generators' and 'hacks' for games. The primary redirect URL is http://netcdn.tw/app/406889139/coin-master-spin-cheat-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering lure to drive-by downloads or further phishing attempts.

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-spin-cheat-game-hack In PDF document text
    • http://library.stieyapan.ac.id/repository/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-free-spin-best-link_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-do-you-hack-for-2021000-coins-on-flip-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-hack-android-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-real-hack_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/robux-earning-websites_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/hack-coin-master-without-root_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/minecraft-games-free-to-play-online_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-limited-roblox-items_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/robux-match_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-hack-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/robux-withdraw_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-hack-game-download-ios_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/hack-coin-master-download_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-lumber-tycoon-2-free-ticket_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/robux-rewards_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-get-free-robux-changer_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/minecraft-hack-2021_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-hack-download-for-games_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_off00003045.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3045 22468 bytes
SHA-256: c95186b05fdc57fa7bd0e41343c526f167e239af17d691b92ab99c3e849c1217
font_01_sfnt_off00006251.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6251 18176 bytes
SHA-256: 3199fee58fbf128b0b7204f9060370fea0cf5ccd916deac964171f15d58e92c9

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