Malicious PDF — malware analysis report

Static analysis result for SHA-256 71df8e0058092f8a…

MALICIOUS

PDF

43.4 KB Created: 2021-05-19 03:40:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 861bd7c7cef877a943849caa79d76217 SHA-1: 5426ffbede7f8f7a6fda57b4c3667e4d5596f17b SHA-256: 71df8e0058092f8a939fc49dd16cb0c0da1da77319ac7d005d4f631a11069d78
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links designed to lure users into clicking on a "Coin Master Free Daily Spins and Coins Game Hack". The primary malicious link redirects to infrastructure known for hosting malicious content and impersonates Facebook to trick users into clicking. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to exploit users through social engineering and redirect them to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/406889139/coin-master-free-daily-spins-and-coins-game-hack.
  • 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-daily-spins-and-coins-game-hack In PDF document text
    • http://www.library.gkigadingserpong.org/repository/legit-coin-master-hack-october-2021_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-hack-ios-12_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/get-free-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-no-download_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/hack-coin-master-apk-32-download_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-hack-coin-master-computer_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/is-there-a-way-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-roblox-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/cone-master_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-hair-for-free_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-free-spins-ios_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-hack-mod-apk-download_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/minecraft-free-download-ios_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-account-roblox-2021_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_off00004d8e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D8E 24804 bytes
SHA-256: d19396982b22db38dfc145bef6cd341a6dd844aa61cfbd6c3aa81d455132c7d9
font_01_sfnt_off000086a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86A8 18480 bytes
SHA-256: 88c5a76ee56cb7e28b06cf9e90949f5a0fd4a72b6dddac6cb3c8c84aebf5620b

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