Malicious PDF — malware analysis report

Static analysis result for SHA-256 1633fdde8615bc32…

MALICIOUS

PDF

41.9 KB Created: 2021-05-17 23:41:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 845d897d46990838a6b6a1530bf75dcd SHA-1: 59e24b145084ca9e52ec378757d68909e879734b SHA-256: 1633fdde8615bc32ed320da41fe2e1b1d97d8430706d24c64e01f129870a5835
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-severity heuristic firing for a 'free generator / game hack' lure, directing users to the URL https://netcdn.xyz/app/406889139/coin-master-free-spins--game-hack. The document body also contains this URL and numerous other links to similar game hack sites, indicating a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/406889139/coin-master-free-spins--game-hack PDF link annotation
    • http://sbm-nn.ru/images/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/toolbox-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/lazyblocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-daily-link_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-hack-without-verification-or-downloading-apps_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-roblox-card_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-hack-ios-no-verification_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/mcpe-master-hack-coin-apk_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/hackear-coin-master-android_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-online-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/roblox-free-hair-codes_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-free-spins-link-no-verification-2021_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_off000047f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47F0 25916 bytes
SHA-256: 25cd145b4bebf8c2fce3233b450a9bca8860af4ffb83eb9ce17ecee4edab3d44
font_01_sfnt_off000082a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82A3 17884 bytes
SHA-256: 7b855ef2bb944b5b370c61480927ccad63ff31bdbf820bc1f0da9d35a10f5fb2

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