Malicious PDF — malware analysis report

Static analysis result for SHA-256 63764e7c66908489…

MALICIOUS

PDF

34.1 KB Created: 2021-06-25 22:43:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 61e40a47de3c8fe02705674b55a73a85 SHA-1: 36d3bb11c088a1f903d0c421068359253ac265a0 SHA-256: 63764e7c66908489710c3f6c7876c826b87c3066d6496638e56aaa706decbe0b
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to websites offering game hacks and free in-game currency, a common lure for phishing and malware distribution. The ML classifier strongly flagged this PDF as malicious, and the presence of external URI heuristics further supports a malicious intent. The document body and heuristics indicate the primary goal is to redirect users to potentially harmful external sites.

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/things-that-are-for-free-in-roblox-game-hack PDF link annotation
    • http://empresa-venta.hr/files/free-robux-nicsterv_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/minecraft-noob-vs-pro-vs-hacker_GM479516143.pdfIn PDF document text
    • http://empresa-venta.hr/files/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/coin-master-spin-cheat_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/free-girl-faces-on-roblox_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/how-to-download-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • http://empresa-venta.hr/files/free-spin-coin-master-link-today_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/free-spins-coin-master-2021-today_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/coin-master-hack-version-download-2021-ios_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/free-roblox-codes-august-2021_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/coin-master-golden-card-hack_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/roblox-free-t-shirt-on-sale_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/legit-coin-master-hack-site-zyngaplayerforumscom_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/minecraft-xbox-360-free-download-code_GM479516143.pdfIn PDF document text
    • http://empresa-venta.hr/files/how-to-get-minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://empresa-venta.hr/files/hack-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/how-to-get-800-robux-for-free_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
stream_002_off00002e55.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E55 22280 bytes
SHA-256: 1a63ef6e7565f6366ec13cdb9b589ffd41111bd1dd17549bbccfebcdfbdbb101
font_01_sfnt_off00006038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6038 19040 bytes
SHA-256: 7d15304463968aac1b13d0ff58e47683d9be5dedd5b52bdc27af85bb2841d159

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