Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ebcb34b1c81054b…

MALICIOUS

PDF

34.0 KB Created: 2021-06-19 12:34:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: adf2db1425ec1611db67a4d915275572 SHA-1: 4249f3375fe898c402a87548c609d9a33149d3f0 SHA-256: 5ebcb34b1c81054b93ede5b877d3727199591476e8f95e4ac3bf89dda83fe6c2
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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.co/app/431946152/free-robux-no-generator-game-hack PDF link annotation
    • http://library.gkigadingserpong.org/repository/coin-master-free-spin-and-trading-group_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/i-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-free-admin-house_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-emergency-response-cheats_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-game-free-download_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-hack-game-download-mod-apk_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/2021-hack-script-roblox_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/robux-for-surveys_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-get-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-hack-without-verification_GM406889139.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_off00003224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3224 21184 bytes
SHA-256: 4e4408ef36a08bdeff9a08992f9fda4634502c83875fb6145c459769e7232d53
font_01_sfnt_off00006052.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6052 18820 bytes
SHA-256: 261ea0d489a423ac242e977cf9c2ebb558fc055835ac2ff71b731d45313ea59b

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