Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef5b29f11071afaa…

MALICIOUS

PDF

33.3 KB Created: 2021-07-06 02:02:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: d068f798ac666e9541efbcc14334865a SHA-1: 9901ae8fe4fc8d711a8a488fe155d562b4870bff SHA-256: ef5b29f11071afaa3ce77fa78819e4de7ecdb6a93e5311dfb23cce512ab1f351
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded URLs, with a primary focus on luring users with game-related hacks and free currency offers. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' and the presence of the URL 'http://netcdn.tw/app/431946152/roblox-assassin-game-hack' strongly indicate a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the document's structure and embedded links suggest it is designed to lead the user to a malicious site, likely for credential harvesting or further payload delivery.

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/roblox-assassin-game-hack PDF link annotation
    • http://library.persadabunda.ac.id/repository/free-minecraft-skin-creator_GM479516143.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/how-to-get-free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/hack-coin-master-apk-ios_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/roblox-free-clothes-girl_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/how-to-get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-fan-hack_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-gfx-roblox_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/how-to-get-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/minecraft-pe-free-download-ios_GM479516143.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/elemental-battlegrounds-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/minecraft-account-hacked_GM479516143.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/20-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-fun-free-spins_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_off00002e9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E9A 21652 bytes
SHA-256: d3ccb6bbd9269ccebd604fd863f44d28fd82f1e79a412bea83faa1b10392bdb7
font_01_sfnt_off00005e23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E23 18608 bytes
SHA-256: 487c57aab2c14b77de6ae94f075bf8bf3a9026a86e5e74f635a4f191a7fd8b96

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