Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1de2d509d507ed8…

MALICIOUS

PDF

34.0 KB Created: 2021-07-05 22:36:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a3a0a230184de3e69a0bf258ff747bef SHA-1: 16bcada85ea4c742cc4026aaa1dae7cfedf18689 SHA-256: b1de2d509d507ed8e2d6b15c89b924b1feb33e637c167fb8a2bc6920eaa2f00f
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/coin-master-hack-8-ball-pool-game-hack PDF link annotation
    • http://pustaka.bbppketindan.info/repository/free-robux-coins_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/minecraft-pocket-edition-mods-for-free_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/download-robux-hack-no-downlowdes_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-hack-apk-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/cone-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-free-robux-on-roblox-ios_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-robux-clibait_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/robux-gift-card-codes-for-free_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/roblox-download_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-free-cards-and-spin-link_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/impact-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-a-bunch-of-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/roblox-cheat-engine-framed-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/mejor-hacker-de-roblox_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_off00002e16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E16 22816 bytes
SHA-256: c049cf673eefcfaf29e6f9c51bcd9fb20f47df26b2b3ac47524d881395468018
font_01_sfnt_off0000613b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x613B 18656 bytes
SHA-256: 9cc3a0a753a325654d75dca011d50bcc08942e96fa930538f944fba4de9b9fc3

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