Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0d153d7a79e4322…

MALICIOUS

PDF

34.6 KB Created: 2021-07-05 16:24:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: a537cdb2836c757dbe11f7e4cb625de0 SHA-1: 2186a75dcac9c09e7cc7dd44e70aa437a661c524 SHA-256: a0d153d7a79e43221ceaa534d6c4f93e3ceedbb15b04320afdb575df2f153264
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-severity heuristic indicating it links to a game hack redirector, specifically http://netcdn.tw/app/406889139/coin-master-reward-link-game-hack. The document body also contains this URL and other similar URLs, reinforcing the lure. The ML classifier strongly flagged this PDF as malicious. While no scripts were extracted, the embedded URL is the primary indicator of malicious intent, likely leading to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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-reward-link-game-hack PDF link annotation
    • http://pustakafpsi.uin-suska.ac.id/repository/mode-hacker-roblox_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/minecraft-ios-mods_GM479516143.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/roblox-polyguns-hack_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/coin-master-hack-extension_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/how-to-get-infinite-robux-for-free_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/wahoo-gaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/free-godzilla-roblox_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/town-roblox-hack_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/free-minecraft-survival-server_GM479516143.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/how-to-get-all-the-clothes-free-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/free-robux-no-offers-no-survey_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/coin-master-hacks-and-cheats_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/robux-generator-online-free_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/hack-coin-master-game_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/robux-hack-no-human-verification-no-download_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/roblox-hack-without-human-verification-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_off000032b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32B7 22312 bytes
SHA-256: 5df930e213d5ac623a95a7faffed93232996254cfd50ccf559e5834b871f220f
font_01_sfnt_off00006459.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6459 18340 bytes
SHA-256: c1246ab1d9e393b3d89bf1ae428e5235d00f0bb5ef049749243bc3f4df939c9c

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