Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5b767fab30f58c2…

MALICIOUS

PDF

33.8 KB Created: 2021-07-06 07:38:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 85726354ac6b4349dbd9bd26d4a115b7 SHA-1: 5edb4f351cfc8077d9ef5d907879063d31ae944c SHA-256: c5b767fab30f58c2d8a89b1d5117631e61f1fbf0d3bd123b8adfeb327a07ee28
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that are disguised as game hacks and generators for popular games like Coin Master and Roblox. The primary URL, http://netcdn.tw/app/406889139/coin-master-rewards-app-game-hack, is flagged as a high-risk redirector. The document body and heuristics indicate a lure to download or access potentially malicious content related to game cheats.

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-rewards-app-game-hack PDF link annotation
    • http://slim.sisminkada.net/repository/coin-master-mod_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/roblox-cheat-buddy-aimbot-script_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/easy-robux-today_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-robux-org_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/tankery-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/is-roblox-free-on-xbox-360_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/robux-online-hack-no-survey_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-robux-2021-july-inspect-element_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-mods-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/roblox-free-clothes-girl_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/can-you-get-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/how-to-get-20-free-robux_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-com-robux_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-roblox-valentines-generator-just-clicks_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/coin-master-hacks-iphone_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/hack-for-robux-with-edit-this-cookie-2021_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/how-to-get-free-robux-inspect_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_off00002dcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DCD 22900 bytes
SHA-256: 18d3c2a5921d9a59bb9ae334ec906a09c8a36b584c14cca1b4792d2b89856bdb
font_01_sfnt_off00006120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6120 18348 bytes
SHA-256: 45424ac4f3ff45d139caa860f388b1f701ed118c37a64d99de4ada9b4bfd65a4

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