Malicious PDF — malware analysis report

Static analysis result for SHA-256 316bdc61ab9259cd…

MALICIOUS

PDF

41.9 KB Created: 2021-05-19 01:30:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4d24366d7d58778b614ff69075ef97ea SHA-1: 10447031d441bf0febc924e0ce14094ea6253284 SHA-256: 316bdc61ab9259cd3ae6e7308deb6fff79b6f1c807962a4d2bc05defad07cd69
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 0.9971

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 https://netcdn.xyz/app/431946152/roblox-robux-game-hack PDF link annotation
    • http://lib.pps.uin-suka.ac.id/repository/real-coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/como-hackear-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/pig-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/coin-master-daily-free-cards_GM406889139.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/coin-master-game-free_GM406889139.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/minecraft-free-ios-no-verification_GM479516143.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/free-spin-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/coin-master-game-free-download_GM406889139.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/coin-master-hack-iphone_GM406889139.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/coin-master-free-100-spin-link_GM406889139.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/coinmasterfreespinlink_GM406889139.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • http://lib.pps.uin-suka.ac.id/repository/free-spins-coin-master-unlimited_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
stream_003_off00004907.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4907 25364 bytes
SHA-256: 05b79f86bedb9a01e60bd1cd4fcb8c431b530e8b1037b6442047e7eef08d862d
font_01_sfnt_off0000823f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x823F 17924 bytes
SHA-256: 85e3be4e3e2e58a235542e1db776439a3ce81e3e8a81a438b582233699a3a0dc

Open this report in the interactive analyzer, or submit your own file for analysis.