Malicious PDF — malware analysis report

Static analysis result for SHA-256 f677c03d94d66a77…

MALICIOUS

PDF

34.3 KB Created: 2021-07-03 22:13:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 469440e4beefdddd980313c21c60833d SHA-1: 2e42ebda8609101df786c379840be13bb12783b7 SHA-256: f677c03d94d66a77142ca82ebf4fd7b1990dac8addf6d12d08c68cd9e4dd7830
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/431946152/free-roblox-mad-city-vip-server-game-hack PDF link annotation
    • http://autoskola-scp.com/files/master-coin-hack-mod_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/coin-master-hack-uk_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-ways-to-earn-robux_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/coin-master-free-spins-link-haktuts_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/minecraft-java-edition-free-download_GM479516143.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-to-download-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-to-get-free-codes-for-roblox_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-to-hack-roblox-on-skywars_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-robux-mobile_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-pe_GM479516143.pdfIn PDF document text
    • http://autoskola-scp.com/files/roblox-cbro-skins-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
font_00_sfnt_off00002d9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D9A 22212 bytes
SHA-256: 8f832bcf178746491aa3fb6dec7f4ede4e4d42ed4aa98925f9ebe82eb79c1abe
font_01_sfnt_off00005e77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E77 19848 bytes
SHA-256: 7e1c405752e0c9cfbb5e99046becac3516e0024917d8b4aa591341fc8aa77f1e

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