Malicious PDF — malware analysis report

Static analysis result for SHA-256 b951154b49b60c06…

MALICIOUS

PDF

33.2 KB Created: 2021-07-20 07:40:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 940b4b6a1d68304e7a184351247bc4f1 SHA-1: f024a5c26c540c3a54674d0e6796280c8d8bd0dc SHA-256: b951154b49b60c065621525222084d1dea99826f9e535f918aef503827e3f5b8
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, with a primary focus on 'game hacks' and 'free spins' for popular games. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' and the embedded URLs strongly suggest a social engineering tactic to trick users into visiting potentially malicious sites. While no scripts were explicitly extracted, the nature of the lures and the ML classification indicate a high likelihood of malicious intent, possibly leading to malware download or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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/406889139/coin-master-free-spins-blogspot-game-hack PDF link annotation
    • http://kovroff.com.ua/images/minecraft-free-install_GM479516143.pdfIn PDF document text
    • http://kovroff.com.ua/images/how-to-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://kovroff.com.ua/images/free-modded-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://kovroff.com.ua/images/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://kovroff.com.ua/images/how-to-get-free-skins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://kovroff.com.ua/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://kovroff.com.ua/images/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://kovroff.com.ua/images/minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://kovroff.com.ua/images/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://kovroff.com.ua/images/is-minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002c5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C5F 22656 bytes
SHA-256: 24710da37f0a80f499ac7a292650d0062c681561c4e1060cf38032f8841ffc21
font_01_sfnt_off00005f16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F16 18464 bytes
SHA-256: 7f13c81e41627db5de1fdc011b77043c9877b216986226f08b9acd2eded814ce

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