Malicious PDF — malware analysis report

Static analysis result for SHA-256 432163057945644e…

MALICIOUS

PDF

44.3 KB Created: 2021-05-13 21:43:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 1fbd5f2dcd98a97c562e36506e0cd6d6 SHA-1: 671b0a7b9720af664bb91ea484a9fb1275347497 SHA-256: 432163057945644e9415321d1ebc4bb5da5430b616bf9dba39394c1a3f567afc
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a fake CAPTCHA lure to trick users into clicking malicious links, specifically advertising 'Coin Master' game hacks. The embedded links, such as https://netcdn.xyz/app/406889139/coin-master-daily-free-spins-link-facebook-game-hack, are associated with known malicious redirector infrastructure. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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-daily-free-spins-link-facebook-game-hack In PDF document text
    • http://radiobuku.com/ipoestaka/repository/can-you-really-hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://radiobuku.com/ipoestaka/repository/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://radiobuku.com/ipoestaka/repository/best-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://radiobuku.com/ipoestaka/repository/coin-master-hack-tool-pc-download_GM406889139.pdfIn PDF document text
    • http://radiobuku.com/ipoestaka/repository/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • http://radiobuku.com/ipoestaka/repository/roblox-premium-free_GM431946152.pdfIn PDF document text
    • http://radiobuku.com/ipoestaka/repository/free-roblox-codes-2021_GM431946152.pdfIn PDF document text
    • http://radiobuku.com/ipoestaka/repository/hack-version-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://radiobuku.com/ipoestaka/repository/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://radiobuku.com/ipoestaka/repository/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • http://radiobuku.com/ipoestaka/repository/free-pet-food-on-coin-master_GM406889139.pdfIn PDF document text
    • http://radiobuku.com/ipoestaka/repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://radiobuku.com/ipoestaka/repository/free-robux-generator-codes_GM431946152.pdfIn PDF document text
    • http://radiobuku.com/ipoestaka/repository/coinmaster-blogspot_GM406889139.pdfIn PDF document text
    • http://radiobuku.com/ipoestaka/repository/master-coin-hack_GM406889139.pdfIn PDF document text
    • http://radiobuku.com/ipoestaka/repository/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://radiobuku.com/ipoestaka/repository/como-hackear-coin-master-gratis_GM406889139.pdfIn PDF document text
    • http://radiobuku.com/ipoestaka/repository/www-roblox-com-robux_GM431946152.pdfIn PDF document text
    • http://radiobuku.com/ipoestaka/repository/ios-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://radiobuku.com/ipoestaka/repository/coin-master-hack-apk-no-fb-login_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004bc5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BC5 27672 bytes
SHA-256: efe715a572fc27603d9d3fadae28fd75ea3632d2eb73d935f812459fbdf64812
font_01_sfnt_off000089ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89CA 18636 bytes
SHA-256: 50d107b0548bd3d005e8b5e4f9cf847a43b3082c8a2089b5591d39299d79db66

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