Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6c3f4543ec9f68f…

MALICIOUS

PDF

41.7 KB Created: 2021-05-17 08:13:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ddf0fa766c0fa9e72a7d91b079d604c3 SHA-1: 547c46922f56caf9d488928c8111af1bdbd3c5d7 SHA-256: d6c3f4543ec9f68f7faa2ab20027d7f284655602ae1391b2a7f66515f27b33db
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure for free game currency and hacks, directing users to a known malicious redirector. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links indicate a likely attempt to redirect users to a malicious site for further exploitation or phishing.

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/free-spins-and-coins-coin-master-game-hack In PDF document text
    • http://stitchingart.com/images/minecraft-classic-free_GM479516143.pdfIn PDF document text
    • http://stitchingart.com/images/coin-master-game-2021-free-spin-link_GM406889139.pdfIn PDF document text
    • http://stitchingart.com/images/jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • http://stitchingart.com/images/coin-master-hack-app-android_GM406889139.pdfIn PDF document text
    • http://stitchingart.com/images/free-girl-hair-roblox_GM431946152.pdfIn PDF document text
    • http://stitchingart.com/images/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • http://stitchingart.com/images/easy-roblox-today_GM431946152.pdfIn PDF document text
    • http://stitchingart.com/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://stitchingart.com/images/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://stitchingart.com/images/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • http://stitchingart.com/images/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://stitchingart.com/images/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • http://stitchingart.com/images/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://stitchingart.com/images/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • http://stitchingart.com/images/how-to-o-get-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://stitchingart.com/images/minecraft-download-free-download_GM479516143.pdfIn PDF document text
    • http://stitchingart.com/images/coin-master-free-chest-link_GM406889139.pdfIn PDF document text
    • http://stitchingart.com/images/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • http://stitchingart.com/images/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://stitchingart.com/images/google-moon-active_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_off00004817.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4817 24864 bytes
SHA-256: cd8bc75666d2b72c4b7599f678056b81ece01ce7bf79842a507da30f2ce3205a
font_01_sfnt_off00008130.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8130 18060 bytes
SHA-256: d4954d2d00bde9f6a1061857a61d2c62c1ae360f44744af150ee923481526d51

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