Malicious PDF — malware analysis report

Static analysis result for SHA-256 42f670b139799ca8…

MALICIOUS

PDF

35.3 KB Created: 2021-07-03 18:23:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: dde502d62b1bf7a6f53165ff59867112 SHA-1: 8f36748d1983692e66528316910364e055038321 SHA-256: 42f670b139799ca83524f902b9e87feaa1351c1276e3c61fd9d4164a70186c2f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is designed as a lure, presenting itself as a 'free generator / game hack' to trick users into clicking malicious links. The primary link, http://netcdn.tw/app/479516143/how-to-get-minecraft-windows-10-edition-for-free-game-hack, is identified as a malicious redirector. While no scripts were explicitly extracted, the document's structure and embedded URLs strongly suggest it's part of a phishing campaign aimed at redirecting users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/how-to-get-minecraft-windows-10-edition-for-free-game-hack In PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/roblox-limited-lua-hacks_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/roblox-gold-chain-t-shirt-free_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/how-to-get-free-robux-easy-website_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/how-to-hack-money-in-heists-beta-updates-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/how-to-change-roblox-username-for-free_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/roblox-hacked-place-database_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/roblox-how-to-get-synapse-for-free_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/the-conquerors-roblox-pre-hacked_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/roblox-dbfs-cheat-engine_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/hack-para-el-catalogo-de-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/how-to-hack-roblox-in-jailbreak_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/roblox-hack-tutorial_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/free-tiktok-accounts-and-passwords_GM835599320.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/on-roblox-how-to-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/free-unlimited-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/how-to-get-free-roblox-items-usuing-android_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/roblox-wings-for-free_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_off00003307.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3307 22652 bytes
SHA-256: faa524a2385821fbb642d4e3d6b8412bd0a3c093f300c675a7999a9b4320963b
font_01_sfnt_off00006582.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6582 18812 bytes
SHA-256: f716e881059f29ffa9bbe1d090f6d126727f740b51ca9620c60dab13ccdfe3d8

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