Malicious PDF — malware analysis report

Static analysis result for SHA-256 194bcad89930e272…

MALICIOUS

PDF

42.5 KB Created: 2021-05-17 03:36:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 703c24ff08b8a924212d8a990a591b87 SHA-1: 738ba729abccb8ae2e59194e2e87bc426b6f6dc3 SHA-256: 194bcad89930e272312a8e0a262e73affa624b84b9832b803456e7aa9d9231fb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure for a "Coin Master Hack" which redirects to a malicious URL. The ML classifier also flagged this PDF as malicious. The embedded URLs and the primary redirector URL are considered high-priority IOCs.

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-hack-without-verify-game-hack In PDF document text
    • http://stpc.it/images/avatar-de-roblox_GM431946152.pdfIn PDF document text
    • http://stpc.it/images/free-robux-clothes_GM431946152.pdfIn PDF document text
    • http://stpc.it/images/minecraft-free-download_GM479516143.pdfIn PDF document text
    • http://stpc.it/images/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://stpc.it/images/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://stpc.it/images/roblox-skins-boy-free_GM431946152.pdfIn PDF document text
    • http://stpc.it/images/coin-master-32-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://stpc.it/images/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • http://stpc.it/images/free-minecraft-domain_GM479516143.pdfIn PDF document text
    • http://stpc.it/images/youtube-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://stpc.it/images/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • http://stpc.it/images/free-online-minecraft-server_GM479516143.pdfIn PDF document text
    • http://stpc.it/images/free-spin-and-coin-blogspot_GM406889139.pdfIn PDF document text
    • http://stpc.it/images/coin-master-apk_GM406889139.pdfIn PDF document text
    • http://stpc.it/images/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://stpc.it/images/fb-coin-master_GM406889139.pdfIn PDF document text
    • http://stpc.it/images/how-to-get-free-spins-on-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://stpc.it/images/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://stpc.it/images/free-minecraft-website_GM479516143.pdfIn PDF document text
    • http://stpc.it/images/google-how-do-you-get-free-robux_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
stream_003_off000045e6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x45E6 26468 bytes
SHA-256: 9aefcb10ff05f447ae110486cae4862a1461a010499be4d1864e3e8846b58205
font_01_sfnt_off000082e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82E2 18532 bytes
SHA-256: 3e0328f2eb925fa9474b2fb0440a25955c930b3cfcf15d5dbe2ab1f8ad488f87

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