Malicious PDF — malware analysis report

Static analysis result for SHA-256 f790a4dcfcd44140…

MALICIOUS

PDF

35.4 KB Created: 2021-07-06 08:14:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 17550e23807a4425da2b5247dac13831 SHA-1: fb7561af982befce82035099838cb5c2c03afbdd SHA-256: f790a4dcfcd441402fb3f6201838115ab71bd9a347ec8ce747a7925d94cc49bb
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/431946152/free-robux-no-gift-card-game-hack PDF link annotation
    • http://www.library.umbjm.ac.id/repository/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-images_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-to-get-free-robux-no-download-2021_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox-robux-generator-free-2021_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/wurst-minecraft_GM479516143.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-hack-mod_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-pc-hack_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-site_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-hacks-free-spins_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/minecraft-free-download-android-apk_GM479516143.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-24-7-minecraft-server_GM479516143.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-spins-link-in-coin-master-2021_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_off000032b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32B3 22568 bytes
SHA-256: 4d60e2599eea9efa482af6c093ad536f6768181a50e13e4328e10d799e8a5d66
font_01_sfnt_off00006539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6539 19112 bytes
SHA-256: 06df68df7bc3afc018589cc38b88bab21292ea0d667e9ea9fa060fabfca3eee6

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