Malicious PDF — malware analysis report

Static analysis result for SHA-256 17c48623e14201b2…

MALICIOUS

PDF

43.0 KB Created: 2021-05-13 10:00:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: cb5572cf27ce88a880735342ba42c5b9 SHA-1: 47dcd69316a7a661fb2f793efc7dc1e148c82279 SHA-256: 17c48623e14201b29adf2d70a7e2e99375bd3451a1dd2ad9f41a6f2dbb517859
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 0.9971

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/431946152/roblox-accounts-for-sale-free-game-hack PDF link annotation
    • http://autoskola-scp.com/files/earn-robux-websites_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-game-pack-with-google-play-coin-master_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/coin-master-free-gift-cards_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/roblox-top_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/get-robux-today_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/coin-master-hacks-2021_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-to-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-robux-cards_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/roblox-troll-outfits-free_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/coin-master-free-spin-link-list_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
stream_003_off000046ea.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46EA 26364 bytes
SHA-256: fa3b83933b02e011ed8ad48fac1176967f2a26d38be8a00dcebd90d0eea3898c
font_01_sfnt_off0000850a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x850A 18420 bytes
SHA-256: dd3ad9a96696997a3401d80a50f84ab99edff121f3fdc84dc04c1b1c7a8d1cbe

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