Malicious PDF — malware analysis report

Static analysis result for SHA-256 8963e9c5d9f0ce66…

MALICIOUS

PDF

45.1 KB Created: 2021-06-07 02:24:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 3cc5026fb620dae2b3f6be69a41291f4 SHA-1: 20c15a01bc9cad6356100a8ff578fe43e6f66b13 SHA-256: 8963e9c5d9f0ce668b13e264639e0babae136b517c3c39d3a048389989e6d960
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 0.9865

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/guild-to-get-free-robux-game-hack PDF link annotation
    • http://autoskola-scp.com/files/roblox-cheat-codes_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-robux-real_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/robux-free-2021_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-roblox-codes_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/roblox-accounts-for-sale-free_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/are-there-any-coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/is-tiktok-free-on-app-store_GM835599320.pdfIn PDF document text
    • http://autoskola-scp.com/files/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-roblox-mad-city-vip-server_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/minecraft-that-you-can-play-for-free_GM479516143.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-to-hack-coin-master-pc_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-exploits-for-roblox_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-to-get-minecraft-for-free-on-tablet_GM479516143.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-to-hack-people-on-roblox_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_off00004e43.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E43 27468 bytes
SHA-256: c520da9ed9aa696478f46a5cbf937f89c3482cac2e7d4e4c9cbd65562c2cb91b
font_01_sfnt_off00008d09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D09 18484 bytes
SHA-256: ec361d4cec3d5bcec396d010f5046b75c1091c736a0a05d1413af08460e6414a

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