Malicious PDF — malware analysis report

Static analysis result for SHA-256 f636e7d4de15caf6…

MALICIOUS

PDF

34.1 KB Created: 2021-07-05 12:59:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: a0306deb048513e32637158f9dd26688 SHA-1: ad03dbc0b7359f9c2d6bdcccb02e97308d4bfd87 SHA-256: f636e7d4de15caf64125b560e0b2a4745a2081098cb3ed5aef4023744738d411
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/479516143/free-minecraft-gift-card-game-hack PDF link annotation
    • http://lib.teknik.unimal.ac.id/repository/shirt-roblox-2021-free-dowload-trans_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-robux-coins_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/site-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/hack-coin-master-spin_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/free-spins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/how-to-gain-more-spins-on-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-to-create-t-shirts-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/roblox-prizes-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/roblox-gear-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/robux-claimer_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/coin-master-free_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-to-hack-roblox-so-you-can-get-robucks_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/20-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/roblox-how-to-cheat-in-currency-in-games-2021_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-to-hack-robux-with-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/minecraft-free-download-apk-softonic_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/earn-free-robux-by-doin-tasks_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-to-get-free-accessoires-roblox_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_off00003472.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3472 21484 bytes
SHA-256: 17e699d55611e2734a0d51305d716397cde8d5eec50e4fad96cc2f897306cd15
font_01_sfnt_off00006340.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6340 18028 bytes
SHA-256: 4a3c9b0af9a1c9a28351056b4340472f9d26aba17cec2b4ebc491c0840baf217