Malicious PDF — malware analysis report

Static analysis result for SHA-256 938e38dbd9fced62…

MALICIOUS

PDF

38.9 KB Created: 2021-05-21 01:20:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d9d0ef57dda39b95418b31d13cc7d588 SHA-1: 6a278a38236dcdf2ba75dff56105d6ef3a016757 SHA-256: 938e38dbd9fced625f455a299369d0d43354c48004ab2ba6544ddcc30b1fff4e
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 0.9476

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/how-to-get-free-robux-app-game-hack PDF link annotation
    • http://roxe2banh.com/public/upload/files/roblox-toy-codes-free_GM431946152.pdfIn PDF document text
    • http://roxe2banh.com/public/upload/files/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://roxe2banh.com/public/upload/files/how-to-get-unlimited-robux-2021_GM431946152.pdfIn PDF document text
    • http://roxe2banh.com/public/upload/files/free-download-coin-master_GM406889139.pdfIn PDF document text
    • http://roxe2banh.com/public/upload/files/master-coins-free_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_002_off000033e6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33E6 29444 bytes
SHA-256: d56062e7b323a27377431f19d5b9f51d96c46bb15f5a24f911cf9723833a9e6d
font_01_sfnt_off0000765c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x765C 18460 bytes
SHA-256: 9b29575604d2c2a5900261a35c88052e604744084870fcd9fc708b4f32deccf1

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