Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b8a9203081dcc6c…

MALICIOUS

PDF

35.2 KB Created: 2021-06-26 03:03:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 057d6a2664472c8c241ca2178fa45ab3 SHA-1: bb683298c88ab5f3fe9e26d99d682ba3484a6700 SHA-256: 3b8a9203081dcc6c50f900d018803a847da516f40d8a9c94af5dd1bc3fda95b5
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/roblox-robux-hack-2021-pastebin-game-hack PDF link annotation
    • https://library.itn.ac.id/perpusitn/repository/coin-master-hack-spin-generator_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-robux-no-verification-generator_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/pokemon-go-free-walker_GM1094591345.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/spin-coin_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/can-i-change-my-name-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-hack-download-for-pc_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-hack_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/flame-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/injector-to-hack-in-roblox_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/script-for-pubg-uc-hack_GM1330123889.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-auto-piano-hack_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-to-generate-free-coin-master-spin_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/pokemon-go-free-youtube_GM1094591345.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-to-get-free-gold-cards-on-coin-master_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-free-spins-link-2021-iphone_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/cheats-for-phantom-forces-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_off0000318a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x318A 22224 bytes
SHA-256: 96b83a4a48faebe8bcdd8462a6c0b6c07954856afb9fc5fe227027b5c671b105
font_01_sfnt_off000062d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62D5 19576 bytes
SHA-256: 1320188f2d678b1b8c27aa475bcd56749b134c85490119ee549ac48ba5ddc682

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