Malicious PDF — malware analysis report

Static analysis result for SHA-256 727959c3d81b4d71…

MALICIOUS

PDF

44.6 KB Created: 2021-05-10 17:47:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 415100dcfc95702056c8298ccc85190d SHA-1: 84bce920d84ac966cdbe6829e125f731e7f913b9 SHA-256: 727959c3d81b4d715669d6e4ecd9082ddacb2f43aff69a8749c507465409c890
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to known malicious infrastructure, specifically promoting "game hacks" and "generators". The primary lure URL is https://netcdn.xyz/app/406889139/coin-master-online-hack-link-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious redirector workflow designed to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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-online-hack-link-game-hack In PDF document text
    • http://fia.ub.ac.id/katalog/repository/rewards-roblox_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/minecraft-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/is-minecraft-free_GM479516143.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/mcpe-master-coin-hack-apk_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/coin-master-support_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/hack-coin-master-ios-download_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/spin-coin-master_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/free-mods-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/can-i-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/free-minecraft-java-server_GM479516143.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/cool-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/www-coinmaster_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/easy-points-gg_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/free-robux-co_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_off00004aec.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AEC 29712 bytes
SHA-256: 6784ffe4aa2791e11ed8b448c0795efa206c3b97569dcb25fc4fda9d04f91e47
font_01_sfnt_off00008dcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DCF 17788 bytes
SHA-256: dd7a4057587595e78019333ccc667320d6d804c022730983449509c018bf4689

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