Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d92492832af4be0…

MALICIOUS

PDF

33.7 KB Created: 2021-07-04 08:28:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: aaa1b93b0727f02170583827aa859314 SHA-1: 52e13081fd8d614ca4e3797922d03f28763da78b SHA-256: 9d92492832af4be0f5197c128bc63f4b4657ff3156946283e2c2213ab7a7c817
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-severity heuristic firing for a 'GAME_HACK_REDIRECT_LURE', indicating it links to a generator or hack site. The document body and embedded URLs reinforce this, pointing to 'free minecraft account' and similar game-related lures. The primary URL identified, http://netcdn.tw/app/479516143/free-minecraft-account-game-hack, is the most prominent IOC. While no scripts were explicitly extracted, the PDF format itself can embed JavaScript, and the ML classifier strongly flagged this as malicious.

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-account-game-hack PDF link annotation
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-games-for-free-for-kids_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/prison-life-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-reward-link_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/pokemon-go-free-things_GM1094591345.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/floating-hack-in-roblox-star-wars-first-order_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/download-coin-master-apk-hacked_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-do-you-get-free-pet-food-in-coin-master_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-roblox-accounts-with-robux-2021-september_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-catalog-items-roblox-pastebin_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/robux-card-codes-free_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-copyright-free-music_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/xdaniel-hack-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-get-daily-free-spins-on-coin-master_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
font_00_sfnt_off00002fd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FD1 22384 bytes
SHA-256: 0a42695af7388d9a90ffbcebc3a1ccde7b35d0fb317d4f205e7cebf709cf978d
font_01_sfnt_off00006150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6150 18140 bytes
SHA-256: bf622982fa8c99a0d325c1609f31225d3bf40058dc9cd86c15c3e8f5bbc20de8

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