Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c72b1ca50df4fbc…

MALICIOUS

PDF

35.3 KB Created: 2021-07-09 01:45:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4cb892be00c7646629b0613595bfbc54 SHA-1: 81768631623b9013fb8c98185a85565f8c577517 SHA-256: 7c72b1ca50df4fbc8bb81e3bf9dc484b8f58b11135b8f990f8a8298dd198c32c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free in-game currency and hacks for popular games like Coin Master and Roblox. It contains multiple links to redirector domains, including http://netcdn.tw/app/406889139/free-rare-cards-for-coin-master-christmas-game-hack, which is flagged as malicious. The document's primary function appears to be directing users to potentially harmful websites through these links, likely as part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/free-rare-cards-for-coin-master-christmas-game-hack In PDF document text
    • http://wadimor.co.id/media/imagesfiles/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/get-free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/roblox-a380-free-model_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/100-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/apk-hack-de-roblox_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/free-robux-obby-meaning_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/free-vip-server-roblox_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/minecraft-pocket-edition-apk-free-download_GM479516143.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/minecraft-world-free-download_GM479516143.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/art-money-roblox-hack_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/roblox-studio-free-download_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/free-spins-october-28-2021-coin-master_GM406889139.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/tiktok-free-skin-event_GM835599320.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_002_off0000334c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x334C 22928 bytes
SHA-256: c8b8dbd6910abdbff6da5ecf2aba2896bc2e32895fc458cee0f0ef6f762a9f03
font_01_sfnt_off000066c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66C8 18600 bytes
SHA-256: 784c5c43db1f59aa9405f56eca204774df99ad96af592b59070832778e8bce4d

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