Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b386a895464a6ba…

MALICIOUS

PDF

43.9 KB Created: 2021-05-11 01:00:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: f4d074e4de47e1f2f04db2c2c380fc80 SHA-1: d2fb6fc4614f36b31b8bf5121c83417490d7b108 SHA-256: 5b386a895464a6ba0c33d93f609b83e38623d1d98c00a5ff42be4a172f666ccf
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and other PDF files, disguised as "free generator / game hack" lures. The primary malicious URL identified is https://netcdn.xyz/app/406889139/coin-master-free-cards-2021-game-hack. The document's structure and embedded links strongly suggest a phishing or scam attempt designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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-cards-2021-game-hack In PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/coin-master-game-free-spin-download_GM406889139.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/minecraft-116-free_GM479516143.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/coin-master-hack-apk-download-for-android-mobile_GM406889139.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/download-hack-coin-master-apk_GM406889139.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/free-minecraft-windows-10-with-java_GM479516143.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/free-roblox-svg_GM431946152.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/rbx-free-robux_GM431946152.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/coin-master-free-gold_GM406889139.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/free-robux-no-download_GM431946152.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/kachifpro_GM406889139.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/get-2021-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/free-robux-only-username_GM431946152.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_off00004f20.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F20 25132 bytes
SHA-256: 9783ff3043a4172aeac9298e43506b71a06d7c434e5348b83dd752bb5f70ce82
font_01_sfnt_off00008928.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8928 18288 bytes
SHA-256: 1103c1a9052967993c67e1ec6a20b7963a45820bc749ae4085be8aaf66ba1d93

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