Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f2d452b46d64e5a…

MALICIOUS

PDF

42.9 KB Created: 2021-05-20 03:39:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f1e9e3aa9a41d45ed08311e3bb1c5498 SHA-1: 5c0fbe1d2413e9cc1b3c9e2cd580e889a29330fb SHA-256: 4f2d452b46d64e5af0a18cf8d0106f4d137c4a4f8e5b842b766ade26fd0a5962
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector infrastructure at `https://netcdn.xyz/app/406889139/coin-master-free-spin-and-coin-links-game-hack`. The document body and heuristics indicate a lure for free in-game items, likely intended to lead users to a phishing or malware download site. No scripts were extracted, but the presence of embedded URLs and the malicious redirector strongly suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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-spin-and-coin-links-game-hack In PDF document text
    • http://www.lycee-langevin-wallon.com/images/how-to-get-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://www.lycee-langevin-wallon.com/images/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.lycee-langevin-wallon.com/images/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://www.lycee-langevin-wallon.com/images/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://www.lycee-langevin-wallon.com/images/roblox-free-items_GM431946152.pdfIn PDF document text
    • http://www.lycee-langevin-wallon.com/images/free-spins-coin-master-links-twitter_GM406889139.pdfIn PDF document text
    • http://www.lycee-langevin-wallon.com/images/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • http://www.lycee-langevin-wallon.com/images/how-can-i-get-free-coinsn-coin-master_GM406889139.pdfIn PDF document text
    • http://www.lycee-langevin-wallon.com/images/free-robux-co_GM431946152.pdfIn PDF document text
    • http://www.lycee-langevin-wallon.com/images/youtube-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.lycee-langevin-wallon.com/images/robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://www.lycee-langevin-wallon.com/images/roblox-play-now-for-free_GM431946152.pdfIn PDF document text
    • http://www.lycee-langevin-wallon.com/images/minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • http://www.lycee-langevin-wallon.com/images/minecraft-free-edition_GM479516143.pdfIn PDF document text
    • http://www.lycee-langevin-wallon.com/images/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.lycee-langevin-wallon.com/images/coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
    • http://www.lycee-langevin-wallon.com/images/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.lycee-langevin-wallon.com/images/minecraft-pe-apk-download_GM479516143.pdfIn PDF document text
    • http://www.lycee-langevin-wallon.com/images/coin-master-daily-free-spins-link-today-2021-free_GM406889139.pdfIn PDF document text
    • http://www.lycee-langevin-wallon.com/images/coin-master-hack-ios-10_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_003_off00004b3e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B3E 25400 bytes
SHA-256: 05f1b13b9799774662a1c722861ba90390256a53c7ba783d4de57d9f6790dec7
font_01_sfnt_off00008590.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8590 18228 bytes
SHA-256: ab1c4cdc214a6baf81a15e2f62a40ea9cfbbbf407f0f3dd1c7564e467cf0dae2

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