Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b974335902cb63d…

MALICIOUS

PDF

35.0 KB Created: 2021-07-07 08:22:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 9047b241b79b250b41316ebfdc6b5c7b SHA-1: 2eb40e978ac6a6f28d973259fb24dded6839409f SHA-256: 0b974335902cb63dc11fb82fe174e2f4d23c43a575e66aceac1fb7155c43ab18
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and embedded text that lure the user towards a 'free generator' or 'game hack' website. The primary URL, http://netcdn.tw/app/431946152/how-to-get-free-robux-without-verifying-2021-game-hack, is identified as a redirector to potentially malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest a social engineering tactic to drive users to a malicious site, likely for credential harvesting or malware delivery.

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/how-to-get-free-robux-without-verifying-2021-game-hack PDF link annotation
    • http://www.opac.stieimalang.ac.id/repository/obbys-august-2021-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/hacks-para-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/minecraft-pe-free-download-android_GM479516143.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/how-to-cheat-in-yin-vs-yang-ninja-assassin-roblox_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/coin-master-hack-generator_GM406889139.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/free-yellow-roblox-girl-hair_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/hackear-juego-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/free-robux-hacks-that-actually-work_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/coin-master-hack-without-verification-for-iphone_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/spins-gratis-coin-master-hoy_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/coin-master-hack-game_GM406889139.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/coin-master-free-spin-link-new_GM406889139.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_off00002e4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E4E 22400 bytes
SHA-256: 26d7b1d61bce7b0c29129e1c0ab76f8117e8ff23ff8c43e05a02d24c0e14b9f1
font_01_sfnt_off00006039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6039 20184 bytes
SHA-256: da7d406aba47eea6317da3ede96973437af681d442b83efbb40dfbc95f86b21f

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