Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa90fb11da9c7660…

MALICIOUS

PDF

34.9 KB Created: 2021-07-06 09:43:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: f3d815f884d27b9e580783f8116d5063 SHA-1: 3c3fd7071ed79d9f7a433eaaeb770d0385286e8c SHA-256: fa90fb11da9c7660be1f6c0e664516d4d59e30051bc847af81a0d6b9ad608bce
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document employs a common lure of free game currency and hacks to entice users to click on embedded links. These links, such as http://netcdn.tw/app/431946152/roblox-group-free-robux-game-hack, redirect to potentially malicious websites. The ML classifier strongly indicated maliciousness, and the PDF's structure and content align with social engineering tactics to deliver further threats.

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-group-free-robux-game-hack PDF link annotation
    • http://www.pspmrsmmbk.com/cendana/repository/free-roblox-akatsuki-outfit_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/free-minecraft-accounts-reddit_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/claim-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/roblox-how-to-reclaim-hacked-accounts_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/roblox-command-tools-hack_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/policesym-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/pokemon-go-free-quickest-charge-moves_GM1094591345.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/testing-5-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/google-moon-active_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/minecraft-free-download-iphone_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/free-robux-non-scam-or-hack_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/wurst-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/online-coin-master-free-spin-app_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/how-to-get-a-free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/free-robux-tix-generator-download_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/get-free-robux-easiest-way_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/tiktok-likes-for-free_GM835599320.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_off000032b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32B9 22048 bytes
SHA-256: 12d55c06b39597c491876958e15b994badd0b2d400bc204da81f0176bea59254
font_01_sfnt_off000063c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63C1 18968 bytes
SHA-256: f48b2ae17e84399e3a6b420fde02f8f729f2240ca84fd7cf9c0f4aab3f14a6ff

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