Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd1dc9e3760b23e5…

MALICIOUS

PDF

43.0 KB Created: 2021-06-04 09:19:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 21ce4c16873064903d190a0ea70fd56a SHA-1: f93f2c0cc665bba82dad69a9c1702b60b5079526 SHA-256: cd1dc9e3760b23e54c24a3d8fb78014548c7f918dcd140f88052bd7faca4b8d8
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 0.9874

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.online/app/1094591345/pokemon-go-free-clothes-code-game-hack PDF link annotation
    • http://perpus.masda.ac.id//repository/games-that-can-be-hacked_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/tiktok-free-up-space_GM835599320.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-role-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-no-password_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/minecraft-wurst_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/rbx-land-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-robux-offers_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-spins-coin-master-links-no-human-verification_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/bad-minecraft-free_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/minecraft-mods-download-free_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-spins-on-coin-master-app_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-roblox-app_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-100-free-spins-link_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/minecraft-java-free-account_GM479516143.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_off00004cf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4CF8 24704 bytes
SHA-256: f3aceb13e0cf174725174b5c9c80d6dd80a6c786fa23ca77bc8c1808eaf14e36
font_01_sfnt_off0000857a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x857A 18360 bytes
SHA-256: 5a7775a8506a323617178e52de069cbf75fd5a7cef8605be66dfd84f059a0057

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