Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9714a3137d246b8…

MALICIOUS

PDF

35.0 KB Created: 2021-06-19 02:56:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 819d4bcd769972a02fa41faf55a44a7b SHA-1: e05b8859751034e21016e8e63627effdf3f0680f SHA-256: b9714a3137d246b8fdd751baca19eafc10735a7e4a3f24250362ec86b4749da8
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, with a primary focus on luring users with game hacks and generators for popular games like Roblox and Coin Master. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly indicates this malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence suggest the document is designed to redirect users to potentially malicious sites for downloading malware or engaging in phishing.

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.co/app/431946152/roblox-hacks-for-windowns-10-game-hack PDF link annotation
    • http://slims.abulyatama.ac.id/repository/coin-master-online-hack-tool_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/download-coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/coin-master-free-spins-iphone-2021_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/free-script-exporters-roblox_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/20210-free-spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/fun-games-to-hack-on-roblox_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/www-roblox-robux_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/hack-coin-master-spin-apk_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/minecraft-toys-for-free_GM479516143.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/can-i-download-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/roblox-com-free-play_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/offers-for-robux_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/tiktok-free-online-games_GM835599320.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/free-vip-server-roblox_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_off00002fc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FC0 22388 bytes
SHA-256: 14b95cc40ac87b881acc300cd0a60345e7e564e39c2675c0cc5d58eef62188c6
font_01_sfnt_off000061cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61CD 19752 bytes
SHA-256: e4c7e879a90832ae2852748168c6da5bbf798434582c2494f857d92d562b1e06

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