Malicious PDF — malware analysis report

Static analysis result for SHA-256 e30135f3169645e5…

MALICIOUS

PDF

37.6 KB Created: 2021-05-20 19:56:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: da3568bba3504355181c755bae6a7a86 SHA-1: a43635cd176d5140396694bfaecf09046628d2f2 SHA-256: e30135f3169645e51c882f14ba8f94107880a80ec2ec5d6293e692edd4e371ab
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 0.9447

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/robux-free-c-game-hack PDF link annotation
    • http://autoskola-scp.com/files/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/minecraft-net-download-free_GM479516143.pdfIn PDF document text
    • http://autoskola-scp.com/files/master-free-spin_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/robloxfun-com-generator_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-to-get-free-robux-without-email_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_002_off00003351.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3351 27652 bytes
SHA-256: c2e31b29f8af77e9f5020f75fcd36a2d9d878ec44576b666447944f99264d786
font_01_sfnt_off000072c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72C6 18012 bytes
SHA-256: 3f1ded8a9c51e4f0f41c660fd84d3573ebe8f92a83837bcaa523a9614d650e73

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