Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0b09c2b09e9a1bc…

MALICIOUS

PDF

34.2 KB Created: 2021-07-05 14:10:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c780058eeac2cb078e7fa2ba2caf73c8 SHA-1: 91ca1417a42d13dd725e35b34693c9882f0c03b4 SHA-256: c0b09c2b09e9a1bc90c74cb8116f4f780454a4ef31fda735ed5c959cd5b448dd
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document employs a social engineering tactic, luring the user with promises of game hacks or browser extensions. The embedded URLs, such as http://netcdn.tw/app/406889139/coin-master-hack-game-hack, likely lead to the download of a second-stage payload or a malicious browser extension. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/406889139/coin-master-hack-game-hack PDF link annotation
    • http://digilib-unirow.ac.id/repository/free-coin-master-s_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coin-master-hack_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/roblox-bloxburg-free-money_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/lazyblocks-com-robux_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/roblox-speed-hack-cheat-engine_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coin-master-hack-ios-no-human-verification_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coin-master-free-spins-and-coins-generator_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/money-hack-the-plaza-roblox_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/pokemon-go-for-free-app_GM1094591345.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/free-robux-now_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coin-master-hack-apk-android-1_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/free-roblox-paddwords-cracker-chrome-extension_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coin-master-links-to-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/hacks-to-use-in-roblox_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/robloxhack-pro-gamerscom-robux_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/demon-roblox_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/download-minecraft-bedrock_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_off00003080.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3080 22884 bytes
SHA-256: 2e0d9fe7735c19ed0ff26b744f6aed081d071a24e60b812d497023dd1fb60932
font_01_sfnt_off000063b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63B3 18004 bytes
SHA-256: 2f3a5855c5bac228d8d27cc7f61b57eebad79d58a924e470a0477843dff273c7

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