Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb187b2148d96799…

MALICIOUS

PDF

42.8 KB Created: 2021-05-12 08:36:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 060a5fc40564919d8759164a7f7f6d2c SHA-1: 6ada5bec4287e589ca2203a6f9aea9a3c90e8688 SHA-256: cb187b2148d967995bed999dfe8fa5972f69eae62964a443868aa84d82825670
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting a 'game hack' lure. The primary redirector URL is https://netcdn.xyz/app/406889139/coin-master-free-spins-2021-haktuts-game-hack. This indicates a phishing or social engineering attack aimed at tricking users into visiting potentially harmful sites. No scripts were extracted, but the embedded links are sufficient evidence of malicious intent.

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-spins-2021-haktuts-game-hack In PDF document text
    • https://www.wcauk.org/uploads/files/files/coin-master-spin-cheat_GM406889139.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/is-there-an-actual-hack-that-work-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/free-minecraft-skins-ps4_GM479516143.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/get-free-roblox_GM431946152.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/free-minecraft-website_GM479516143.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/coin-master-free-spins-link-download-today_GM406889139.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/how-to-get-free-snacks-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/play-full-version-of-minecraft-for-free-no-download_GM479516143.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/minecraft-wurst_GM479516143.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/roblox-script-hack_GM431946152.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/robux-sign_GM431946152.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/free-robux-script_GM431946152.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/minecraft-modded-client_GM479516143.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/hack-para-coin-master-sin-verification_GM406889139.pdfIn PDF document text
    • https://www.wcauk.org/uploads/files/files/how-to-get-minecraft-pe-for-free-ios_GM479516143.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_off00004b52.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B52 24984 bytes
SHA-256: affe5aa30ff8720303bd0e448377b7371567794982051595697957fcfbd1930a
font_01_sfnt_off000083f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83F6 18600 bytes
SHA-256: 89773803d88a9f64dc5621ed6622458791426392b237d756dbefd16237d4c6e2

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