Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa235b023464c5f4…

MALICIOUS

PDF

34.9 KB Created: 2021-07-06 14:45:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e2cdeea3f556ab988ac93249a2e1906f SHA-1: 1405ce72cd0dc05084dd3d3bd55274dd2274c67a SHA-256: fa235b023464c5f4228109011e86d4fd573914cc4b63e542b6f11e2e412db9dd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generators' and 'game hacks' for popular games. The primary redirector URL identified is http://netcdn.tw/app/431946152/free-roblox-toy-codes-2021-game-hack. This indicates a social engineering lure designed to trick users into visiting potentially harmful sites, likely for credential harvesting or malware distribution.

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 http://netcdn.tw/app/431946152/free-roblox-toy-codes-2021-game-hack In PDF document text
    • http://muslib.unmus.ac.id/repository/cheap-free-easy-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-hack-pc-free_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/cheating-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/games-that-give-you-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/clean-master-hack-coins_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/legit-coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-spins-coin-master-april-2021_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-mod-version-free-download-34-4_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-roblox-exploit-that-lets-you-use-gears_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/descargar-hack-de-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-do-you-robux-for-free_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-hack-commercial_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/speed-hacks-on-fangs-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-free-spins-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-hack-cheat-generator-coins-and-spins-unlimited_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-vehicle-tycoon-cheats_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/auto-clicker-for-mac-roblox-free_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-lumber-tycoon-cheats_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
font_00_sfnt_off0000309f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x309F 22340 bytes
SHA-256: d6eb5d29c3e5641c974756c6821b84ed73b99f965863b0cfad8314174680bd7b
font_01_sfnt_off00006244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6244 19404 bytes
SHA-256: d69dc009ca5c1a88d041a827f1c58a74829db1b517c4b80ace25ccdd541b8d6b

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