Malicious PDF — malware analysis report

Static analysis result for SHA-256 71953ee939594ddf…

MALICIOUS

PDF

42.1 KB Created: 2021-05-19 19:40:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 98440c9f7ba3a6fafdbfb86361c3395d SHA-1: 1bdde693aca6504d9c78e3d2df87c66d070d553a SHA-256: 71953ee939594ddfaa959ae2698d89a2a0c7169509218903b31b1fb2b673d215
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically advertising 'Coin Master Hack' and 'Robux' generators. The primary lure URL is https://netcdn.xyz/app/406889139/coin-master-hack-no-human-verification-2021-game-hack, which is flagged as malicious. The document body, though heavily obfuscated, contains references to this URL and appears to be a lure for a scam. No scripts were extracted, but the embedded links strongly indicate a phishing or scamming attempt.

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-hack-no-human-verification-2021-game-hack In PDF document text
    • http://arthakranti.org/images/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://arthakranti.org/images/microsoft-store-robux_GM431946152.pdfIn PDF document text
    • http://arthakranti.org/images/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://arthakranti.org/images/free-minecraft-windows-10-account_GM479516143.pdfIn PDF document text
    • http://arthakranti.org/images/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://arthakranti.org/images/robux-free-com_GM431946152.pdfIn PDF document text
    • http://arthakranti.org/images/free-minecraft-videos_GM479516143.pdfIn PDF document text
    • http://arthakranti.org/images/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • http://arthakranti.org/images/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://arthakranti.org/images/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://arthakranti.org/images/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://arthakranti.org/images/robux-free-robux_GM431946152.pdfIn PDF document text
    • http://arthakranti.org/images/pokemon-go-free-avatar-items_GM1094591345.pdfIn PDF document text
    • http://arthakranti.org/images/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://arthakranti.org/images/how-to-get-real-robux_GM431946152.pdfIn PDF document text
    • http://arthakranti.org/images/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://arthakranti.org/images/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://arthakranti.org/images/minecraft-noob-vs-pro-vs-hacker-vs-god_GM479516143.pdfIn PDF document text
    • http://arthakranti.org/images/get-gold-coin-master-village-hack_GM406889139.pdfIn PDF document text
    • http://arthakranti.org/images/coin-master-hack-2021_GM406889139.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
font_00_sfnt_off00004902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4902 24476 bytes
SHA-256: 1b967801da9a0dceee5d9905bc2e1929acb2eacc34de137502dfab9d6f66da96
font_01_sfnt_off000080e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80E5 18652 bytes
SHA-256: a8ac93ce14fdca52a5b6c8b5e666cce4eecb8a0a07e33e24ccf8b934d9dd8f42