Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e811f49e397b93d…

MALICIOUS

PDF

36.6 KB Created: 2021-05-23 15:17:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1a9016e5b76334b2e7e36b3f84047e73 SHA-1: 98c1e44058ead9b4af5f249084b7b36c6c888460 SHA-256: 6e811f49e397b93d0bae9e0aab48077e4927fc240a8e9e1413d09f4dca58825c
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/406889139/how-to-get-free-spins-in-coin-master-game-hack PDF link annotation
    • http://regiefranchet.fr/userfiles/files/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://regiefranchet.fr/userfiles/files/free-minecraft-videos_GM479516143.pdfIn PDF document text
    • http://regiefranchet.fr/userfiles/files/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://regiefranchet.fr/userfiles/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://regiefranchet.fr/userfiles/files/free-coin-master-spins-2021_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_off00003432.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3432 24044 bytes
SHA-256: f2cffce3b40c101188bd2558560cd20b5dd3c2da31f267dc9cc9f68f340bdf19
font_01_sfnt_off00006af5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AF5 19212 bytes
SHA-256: ac6f8f3cde37ce83f5c88b597da1b0af49e0c9346e8ed3ee93d9db02862d645a

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