Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bc35cae5342dbf6…

MALICIOUS

PDF

45.3 KB Created: 2021-06-08 13:03:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e908ffab64b720462a06ed758bfb1dfd SHA-1: 267c86be4dc2a8139110314f464f938d4757ba1e SHA-256: 6bc35cae5342dbf6c8f52a7ea8a03e9c0c1b5099646833d58c2db53ee0042881
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/roblox-free-robux-obby-game-hack PDF link annotation
    • http://aviaprofsoyuz.info/images/roblox-dominus-free_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/free-private-minecraft-server_GM479516143.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/i-need-robux_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/roblox-hack-no-virus_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/earnrobux_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/minecraft-free-download-android-apk_GM479516143.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/free-coin-app_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/free-minecraft-printables-food-labels_GM479516143.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/como-descargar-coin-master-hackeado_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/wwwcoin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/roblox-robux-hack_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_004_off0000532f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x532F 25404 bytes
SHA-256: 14d1d26f81b58ccbd671efe29319c782c58c5f97266aaf0bef7e4d8e1f493bd2
font_01_sfnt_off00008eaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EAA 18268 bytes
SHA-256: 0940856f7ecea4107b69e5f0599af8ddb9b04f83b610ebb0a5a45b9880b7d735

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