Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5bc053c361ea55e…

MALICIOUS

PDF

34.7 KB Created: 2021-07-08 16:58:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 146d32ed4e0c2e92756d24ca15be0941 SHA-1: 40b931f8d01ac1520308ed6eaaa766e4ec7a7b02 SHA-256: a5bc053c361ea55e4ba4f967f9515ac945cf2f0da15826860b10698f5e3a91f9
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 0.9980

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.tw/app/479516143/how-to-get-free-minecraft-coins-game-hack PDF link annotation
    • http://autoskola-scp.com/files/free-robux-no-survey-ipad_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/roblox-builders-club-free_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/promo-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/coin-master-hack-tool-apk-download_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/roblox-unlimited-robux-hack-no-download_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/coin-master-free-spin-download_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/where-do-i-put-roblox-hack-scripts_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/costume-roblox-free_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-online-minecraft-server_GM479516143.pdfIn PDF document text
    • http://autoskola-scp.com/files/coin-master-apk-hack-download_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/get-free-robux-gg_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-to-hack-roblox-murder-15_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/is-minecraft-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-to-create-a-shorts-roblox-free_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-to-get-free-robux-on-computer_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
font_00_sfnt_off00003200.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3200 23156 bytes
SHA-256: 1665bd2e3672863efcecc9dd203ec9f66925e54cdec64d47863ef31ca13be7a4
font_01_sfnt_off00006581.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6581 18164 bytes
SHA-256: beda6d2eeaedf06c4f9c71f25ee73c2930771b9967372e0e5b2633e02f8c4c40

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