Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1f41c25a4cf7732…

MALICIOUS

PDF

34.6 KB Created: 2021-07-03 21:43:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 4b4a73bb931fac7b06c56c37d34b76f0 SHA-1: 1e80343f770bdedffb5c252a1d945b450a19a328 SHA-256: e1f41c25a4cf77326cb5976ff0f93190cf0f14f5f798a2b671e16b649db4cbb4
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.tw/app/406889139/free-spins-coin-master-links-blogger-game-hack PDF link annotation
    • http://www.library.umbjm.ac.id/repository/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox-avatar-maker-free_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox-apk-mod-hack_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-to-get-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-coin-master-hacks-no-verification-or-survey_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/hack-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/dll-files-hack-for-roblox-vehicle-simulator-2021_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-to-get-free-roblox-hair_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-free-spin-app-apk_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox-hackprogamers-com_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-roblox-noclip-exploit_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/2021-robux-free-host_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-mod-apk_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-codes-real-2021_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-hacks-free-spins_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_off000030aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30AA 22700 bytes
SHA-256: a2f63a31dad57f4fe7f59e7207f561273c9d6c609436fe9c4c5bec6bc2c4ed37
font_01_sfnt_off00006382.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6382 18632 bytes
SHA-256: 3bd5d70d92567c4e9fdab6ab0c4abb83fff73585d00d870a94bf54a7db3788b5

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