Malicious PDF — malware analysis report

Static analysis result for SHA-256 90f636beafb56330…

MALICIOUS

PDF

33.6 KB Created: 2021-07-05 07:35:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 0e00794e04dfda79d3e567093b32ae0b SHA-1: ad4e479adbd45746baf54ff63c9eb9c5a91f630f SHA-256: 90f636beafb56330bcb84e834bc3d8e7b4ce889314910cf95a2447b87cced416
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure for game hacks and free currency, directing users to a known malicious redirector. The document contains numerous embedded URLs that likely lead to further malicious content or downloads. The presence of multiple redirector links and the ML classifier's high confidence indicate a malicious intent to deceive 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 http://netcdn.tw/app/406889139/coin-master-free-spins-heaven-game-hack In PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/oginject-co_GM406889139.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/minecraft-client_GM479516143.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/coin-master-heaven-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/ninja-assassin-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/pubg-uc-quiz_GM1330123889.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/comment-cheat-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/free-executor-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/free-roblox-svg_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/how-to-get-50k-robux-for-free_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/mob-buster-robux-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/change-your-roblox-name-for-free_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/how-to-get-free-shirts-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/roblox-hack-me_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/minecraft-free-apk-java-edition_GM479516143.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/roblox-robux-codes-2021_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_off00002e9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E9B 22460 bytes
SHA-256: 1ba70a48b75e6470fad0e927cc72dff7e8bf1130568d21ddae0b6f334fc0ee23
font_01_sfnt_off0000609e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x609E 18288 bytes
SHA-256: ec33f891d0c2e54048bbb9a0f23160c4329abb01e99b49d4e5745551193b5b49

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