Malicious PDF — malware analysis report

Static analysis result for SHA-256 6579b49acfdfd4c9…

MALICIOUS

PDF

42.7 KB Created: 2021-06-03 04:17:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 43988bb8dbff9efe12aaa61fa84b3866 SHA-1: 238814391bded23764ad0e1d9de0bbbb1e071098 SHA-256: 6579b49acfdfd4c9d522713869b09212d8de975b91258148c7e211c1dc197ca2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to websites that are flagged as malicious redirectors, specifically promoting game hacks and generators. The document body and embedded URLs suggest a lure to trick users into visiting these sites, likely to download further malware or engage in phishing. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

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.online/app/406889139/coin-master-100-spin-game-hack In PDF document text
    • http://pustaka1.unindra.id/repository/free-roblox-gift-card-codes-2021-unused_GM431946152.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/rewards-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/hack-coin-master-spin-android_GM406889139.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/coin-master-apk-free-download_GM406889139.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/www-free-robux-com_GM431946152.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/coin-master-hack-pc-2021_GM406889139.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/how-to-get-free-coins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/coin-master-34-6-hack_GM406889139.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/robux-without-verification_GM431946152.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/wurst-client-18-9_GM479516143.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/free-coin-spin-daily-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/coin-master-hack-ios-2021_GM406889139.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/coin-master-hack_GM406889139.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/can-you-hack-coin-master_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
stream_004_off00004c76.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C76 24604 bytes
SHA-256: c20f7981f9ece79bf4da9b02d3487f2579f54eb0ebae646cf240e6ed9737bf54
font_01_sfnt_off000084fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84FE 18000 bytes
SHA-256: 01f803363f7eeb4dce0f816621254ac49837589185e144589db73f807fad6798

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