Malicious PDF — malware analysis report

Static analysis result for SHA-256 22c97441a8fdc768…

MALICIOUS

PDF

42.2 KB Created: 2021-05-15 04:38:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2e4505874d5f168dfd5f0776c622846d SHA-1: 8ade0207b43c4184101ff10f464d3d95d2c00859 SHA-256: 22c97441a8fdc768669d997115c84d4866b1f5117af539c73dffda60ab982f9e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector infrastructure, specifically advertising 'free generators' and 'game hacks' for popular games. The primary redirect URL, https://netcdn.xyz/app/406889139/coin-master-free-coins-and-spins-2021-game-hack, is flagged as malicious. The document body and embedded URLs suggest a social engineering lure to trick users into visiting potentially harmful sites. No scripts were extracted, but the heuristic firings strongly indicate a malicious redirector campaign.

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-free-coins-and-spins-2021-game-hack In PDF document text
    • https://doingimc.com/image/data/files/get-free-robux-now_GM431946152.pdfIn PDF document text
    • https://doingimc.com/image/data/files/moonactive-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://doingimc.com/image/data/files/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • https://doingimc.com/image/data/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://doingimc.com/image/data/files/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • https://doingimc.com/image/data/files/master-coin-hack-app_GM406889139.pdfIn PDF document text
    • https://doingimc.com/image/data/files/spin-rewards-coin-master_GM406889139.pdfIn PDF document text
    • https://doingimc.com/image/data/files/free-spins-coin-master-october-17-2021_GM406889139.pdfIn PDF document text
    • https://doingimc.com/image/data/files/daily-free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • https://doingimc.com/image/data/files/coin-master-free-spins-link-hack_GM406889139.pdfIn PDF document text
    • https://doingimc.com/image/data/files/free-roblox-clothes-codes_GM431946152.pdfIn PDF document text
    • https://doingimc.com/image/data/files/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • https://doingimc.com/image/data/files/to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://doingimc.com/image/data/files/get-me-free-robux_GM431946152.pdfIn PDF document text
    • https://doingimc.com/image/data/files/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • https://doingimc.com/image/data/files/free-spins-and-coins-com_GM406889139.pdfIn PDF document text
    • https://doingimc.com/image/data/files/minecraft-nintendo-switch-digital-code-free_GM479516143.pdfIn PDF document text
    • https://doingimc.com/image/data/files/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • https://doingimc.com/image/data/files/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • https://doingimc.com/image/data/files/coin-master-free-spins-link-download-for-iphone_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_003_off00004a5b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A5B 24508 bytes
SHA-256: b048757c774efe490afd8215b6062c9212e94530e3928bf78e23f4c027da6ed8
font_01_sfnt_off0000820a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x820A 18460 bytes
SHA-256: 9b9248072d2421e664493d6d5ab14406474bc62db1d786ff94b6c1680f0f8261

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