Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d276bcc25659b16…

MALICIOUS

PDF

34.8 KB Created: 2021-07-05 17:09:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 073b172738b13ff0b606c818d016d131 SHA-1: 2810a3a702dbe867f73fa6383eeea463a5dfeffb SHA-256: 3d276bcc25659b16ad61e4810f8ea0ba328eaa93de78dadce7573c523ccdf684
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free currency'. The primary redirector URL is http://netcdn.tw/app/406889139/coinmasterfreespinlink-game-hack. This pattern suggests a social engineering lure designed to lead users to potentially harmful websites, likely for further exploitation or malware delivery.

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/coinmasterfreespinlink-game-hack In PDF document text
    • http://stikesyahoedsmg.ac.id/Digital_Library/repository/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • http://stikesyahoedsmg.ac.id/Digital_Library/repository/roblox-accout-stealing-hack_GM431946152.pdfIn PDF document text
    • http://stikesyahoedsmg.ac.id/Digital_Library/repository/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://stikesyahoedsmg.ac.id/Digital_Library/repository/coin-master-free-rare-cards_GM406889139.pdfIn PDF document text
    • http://stikesyahoedsmg.ac.id/Digital_Library/repository/minecraft-on-computer-free_GM479516143.pdfIn PDF document text
    • http://stikesyahoedsmg.ac.id/Digital_Library/repository/coin-master-hack-com_GM406889139.pdfIn PDF document text
    • http://stikesyahoedsmg.ac.id/Digital_Library//repository/free-robux-android_GM431946152.pdfIn PDF document text
    • http://stikesyahoedsmg.ac.id/Digital_Library/repository/earn-free-robux_GM431946152.pdfIn PDF document text
    • http://stikesyahoedsmg.ac.id/Digital_Library/repository/hack-pour-roblox_GM431946152.pdfIn PDF document text
    • http://stikesyahoedsmg.ac.id/Digital_Library//repository/free-spins-for-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://stikesyahoedsmg.ac.id/Digital_Library/repository/roblox-hack-apk-download-android-1_GM431946152.pdfIn PDF document text
    • http://stikesyahoedsmg.ac.id/Digital_Library/repository/haktutsin-2021-09-coinmaster50freespinandcoinlinkhtml-m-1_GM406889139.pdfIn PDF document text
    • http://stikesyahoedsmg.ac.id/Digital_Library/repository/coin-master-free-spins-link-facebook-page_GM406889139.pdfIn PDF document text
    • http://stikesyahoedsmg.ac.id/Digital_Library/repository/free-coin-master-cards-link_GM406889139.pdfIn PDF document text
    • http://stikesyahoedsmg.ac.id/Digital_Library/repository/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://stikesyahoedsmg.ac.id/Digital_Library/repository/coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://stikesyahoedsmg.ac.id/Digital_Library/repository/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://stikesyahoedsmg.ac.id/Digital_Library/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://stikesyahoedsmg.ac.id/Digital_Library/repository/roblox-free-no-download_GM431946152.pdfIn PDF document text
    • http://stikesyahoedsmg.ac.id/Digital_Library/repository/roblox-its-free_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_off00003184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3184 22884 bytes
SHA-256: 64077cae396d2705a1253fd4a64b3946e2b5058ce3f6719e7bb5634db3fab528
font_01_sfnt_off000064c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64C6 18516 bytes
SHA-256: a000f6d0810836f211bd69ad4954bd13017d955b6cad91c28efc413f8e97b1ec

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