Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9390499a30e5609…

MALICIOUS

PDF

44.9 KB Created: 2021-06-03 10:49:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d455a3e4d2a5b2a52f640e8dc82063fd SHA-1: d15c2d45f5e398e24344b5ad9bcae9afd2a29e56 SHA-256: c9390499a30e56095f2a4d9b8aacf20ca2fc28926b73352d65fa874bcf231a39
160 Risk Score

Malware Insights

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

This PDF document contains multiple links to known malicious redirectors and sites offering free game hacks and rewards, such as Coin Master and Robux. The document body and embedded URLs indicate a lure designed to entice users to click through to potentially malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest a malicious redirector workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.online/app/406889139/coin-master-gold-cards-free-game-hack In PDF document text
    • http://perpus.i2s-learning.com/repository/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-rewards-app_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-com-redeem_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-robux-live_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-hacks-for-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-jackpot-madness-hack_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-robux-co_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-get-free-shields-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/javascript-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coinmaster-fan-page_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/watch-ads-for-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-hack-coin-master-cheat-engine_GM406889139.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
stream_004_off00005082.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5082 27068 bytes
SHA-256: 78e626c1b6d594bf98af58b50fee8c5ffb746dd20d7e94d5e5a4b749769ac721
font_01_sfnt_off00008e02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E02 17960 bytes
SHA-256: 5f0d383e38c54a4b706fba9e56337a6488be6196f7a5d6bfa1241f48271576e4

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