Malicious PDF — malware analysis report

Static analysis result for SHA-256 a40ca1ece5431d0a…

MALICIOUS

PDF

33.1 KB Created: 2021-07-06 00:24:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: a3888100b472ef7b7e8e59dfb70ea41e SHA-1: a38d8c37ec1ac22f39d310d80d16ce8dca2944fb SHA-256: a40ca1ece5431d0a65407b2822b5c63b6a4900df976fa00e556a9c5b16af599a
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://digilib.ulm.ac.id/pusat/repository/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-free-recompense_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-roblox-cards-codes-2021_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-free-spins-and-cards_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-upgrade-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-minecraft-wallpaper_GM479516143.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-roblox-adopt-me-pets_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-roblox-templates-twitter_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/yt-fmm-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-play-online-free-no-download_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-400-spin-link-today_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/the-day-roblox-got-hacked_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-hacks-on-roblox-blox-pice-ipad_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-executors-for-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-roblox-game-templates_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-roblox-exploit-injector_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_off00002c9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C9D 21544 bytes
SHA-256: 3b1b0286887a225f09650ec906d38c03e6fcfb8fa7a216f8db9f37773fbe15eb
font_01_sfnt_off00005bd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BD5 19112 bytes
SHA-256: 06df68df7bc3afc018589cc38b88bab21292ea0d667e9ea9fa060fabfca3eee6

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