Malicious PDF — malware analysis report

Static analysis result for SHA-256 23e87488ac2a343b…

MALICIOUS

PDF

45.1 KB Created: 2021-05-11 04:00:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a87e698e801c8daaec6ad8b1b4d04f94 SHA-1: 96e5d6a621db5978717c7a4303de6457c0e232b0 SHA-256: 23e87488ac2a343b7948432e5c68137a7e4d496b755aa2cdcafdb78aef5cb5fa
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for "Coin Master Free Spin Link" and an embedded URI pointing to a suspicious URL. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URIs and the ML classification suggest the document is designed to redirect users to malicious content, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9621

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.xyz/app/406889139/coin-master-free-2021-spin-link-game-hack In PDF document text
    • https://e-learning.mtsduktb.com/__statics/gudangsoal/files/how-to-make-a-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
    • https://e-learning.mtsduktb.com/__statics/gudangsoal/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsduktb.com/__statics/gudangsoal/files/free-spin-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsduktb.com/__statics/gudangsoal/files/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsduktb.com/__statics/gudangsoal/files/hack-coin-master-game-apk_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsduktb.com/__statics/gudangsoal/files/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsduktb.com/__statics/gudangsoal/files/free-minecraft-severs_GM479516143.pdfIn PDF document text
    • https://e-learning.mtsduktb.com/__statics/gudangsoal/files/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsduktb.com/__statics/gudangsoal/files/optifine-mcpe_GM479516143.pdfIn PDF document text
    • https://e-learning.mtsduktb.com/__statics/gudangsoal/files/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsduktb.com/__statics/gudangsoal/files/free-roblox-girl-hair-not-a-model_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsduktb.com/__statics/gudangsoal/files/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsduktb.com/__statics/gudangsoal/files/how-to-get-infinite-robux_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsduktb.com/__statics/gudangsoal/files/hack-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsduktb.com/__statics/gudangsoal/files/how-to-get-minecraft-dungeons-for-free_GM479516143.pdfIn PDF document text
    • https://e-learning.mtsduktb.com/__statics/gudangsoal/files/fb-coin-master_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsduktb.com/__statics/gudangsoal/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsduktb.com/__statics/gudangsoal/files/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsduktb.com/__statics/gudangsoal/files/roblox-hack-game_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsduktb.com/__statics/gudangsoal/files/best-free-spins-link-coin-master_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_003_off00004cca.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CCA 23912 bytes
SHA-256: d626ceed4edc8a26f7604d61f28fcf30b34cf838ef5c58f0cfa870d960a2d622
font_01_sfnt_off0000832a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x832A 2920 bytes
SHA-256: 601c50867a41b9362538ff18e5f9479a0f9badf698aaf1eb7e88469c11719db7
font_02_sfnt_off00008d43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D43 18456 bytes
SHA-256: b7ae3d16bb028351929840db057611194e7c02105e6dbd3e36d0326cc4cd0414

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