Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fa9ad80f5c23f8d…

MALICIOUS

PDF

34.0 KB Created: 2021-07-04 15:47:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 5ce0abd53b72a85a6fbf70631fdfd0e0 SHA-1: 109edfe172485e93fc40a5b9a062646416bcc604 SHA-256: 3fa9ad80f5c23f8d7454af5d8ed7d34004098f519d9d2dfcebb152a3b942c076
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/roblox-hack-app-game-hack PDF link annotation
    • http://gts.edu.gh/library/repository/get-free-robux-real_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-robux-guuudd-info_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-free-coins-and-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-cheat-codes-feeling-of-falling_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/minecraft-free-online-games_GM479516143.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-edit-script-for-roblox-hack_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/hack-coin-master-game-apk-download_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/hack-coin-master-for-android_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/cheats-for-royale-high-school-on-roblox_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-vocabulary-roblox_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/hacks-for-robux-free_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/frost-guard-general-roblox-free_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-daily-free-spins-link-today-blog_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/hack-roblox-boku_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/rbxoffer-com-free-robux_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-robux-app_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_off00002fe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FE0 21896 bytes
SHA-256: 7ad5bf702afd1e7ce4e1667b4722e3c551fa6a3b7bc812629d214f1a89212ba1
font_01_sfnt_off00006065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6065 18832 bytes
SHA-256: 306f83865665730cccb200b9769a14693e944a35f37b3076e40f03dcf922f572

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