Malicious PDF — malware analysis report

Static analysis result for SHA-256 c497b10fe6f643da…

MALICIOUS

PDF

34.8 KB Created: 2021-07-04 17:15:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ef337f258006ebab266c2754303effa1 SHA-1: be8c13c829297d8e2b945edd0bcbb6f28017ce25 SHA-256: c497b10fe6f643da3d6b75ccf5095875f611474f7d209803deeed16fb99d85e2
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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-and-coins-on-coin-master-game-hack PDF link annotation
    • https://opac.heritagejkt.org/repository/free-printable-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/roblox-obbys-free_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/how-to-get-a-private-server-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/how-to-get-free-robux-on-roblox-no-hacks-joshy_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/www-coin-master-hack-com_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/10-dollar-roblox-card-codes-free_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/coin-master-free-spins-may-11-2021_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/robux-fun-hack_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/cone-master_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/no-verification-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/how-to-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/cpbildco-robux_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/how-to-hack-on-roblox-assain_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/free-online-robux-generator-no-surveys_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/coin-master-hack-online-generator_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/toolbox-for-minecraft_GM479516143.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/easy-robux-today-com_GM431946152.pdfIn PDF document text
    • https://www.urcouponsdeal.com/2019/03/coin-master-free-spin-and-coin-links.htmlIn 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_off000031f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31F5 22868 bytes
SHA-256: 7be517c7d6297e676cf4717412cf43f9e53693a3cfb349ca2953cd71ce83a4a7
font_01_sfnt_off0000653b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x653B 18348 bytes
SHA-256: 99aa2d2b2e9c114759ac0d3175951e1a7ccd7b87db14ea3fc4aa40a1608bcbe0

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