Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a450dde1e4feea9…

MALICIOUS

PDF

34.1 KB Created: 2021-07-03 22:24:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: b2a97ab4fb4e7e9fd2ae708ee01de2cd SHA-1: 6d3862e0eecfc4be153b1f2013d0b80315c52741 SHA-256: 2a450dde1e4feea9334a44755695e5ad5b310cd40716709933dd331bc8152a58
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a high-confidence heuristic indicating it links to a game hack lure. The document body and extracted URLs reinforce this, pointing to a URL designed to trick users into downloading a game hack. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect users to malicious content.

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/406889139/coin-master-hack-for-android-game-hack PDF link annotation
    • https://www.knjigebuducnosti.com/files/how-to-play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/roblox-cheat-engine-how-to-get-it-running_GM431946152.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/coin-master-100-spin-slot_GM406889139.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/names-of-roblox-hack-scripts_GM431946152.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/how-to-get-free-skins-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/free-minecraft-skins-java_GM479516143.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/how-to-hack-roblox-accounts-without-cheat-engine_GM431946152.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/how-to-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/free-robux-generator-without-survey_GM431946152.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/best-free-roblox-executor_GM431946152.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/speed-hack-roblox-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/free-limiteds-roblox_GM431946152.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/super-speed-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/afraid-of-old-roblox-account-being-hacked_GM431946152.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/robux-free-c_GM431946152.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/coin-master-free-spins-no-verification_GM406889139.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/free-robux-no-human-verification-no-survey_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_off00002fed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FED 22700 bytes
SHA-256: 2799ec362c864d6e07549ad70bc0fbbf9072af3553c488b2a50ff11517069611
font_01_sfnt_off0000628d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x628D 18340 bytes
SHA-256: 91bd7ae00f691f984865c926e2a64ff0fe9f54475d2fd04393c90b8ffd432a6a

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