Malicious PDF — malware analysis report

Static analysis result for SHA-256 41314f843be72145…

MALICIOUS

PDF

39.1 KB Created: 2021-05-23 05:26:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 9e14d944d1a69a3b2c4d955b954d13c2 SHA-1: 502cd4076229d8f3b3655b1a16263e335f541e84 SHA-256: 41314f843be72145b20c73bc693debb9ece50b99980d2feba1d4356ba69326f0
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 0.8060

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
    • https://gryps.de/images/how-to-hack-pubg-mobile-unlimited-uc-without-human-verification_GM1330123889.pdfIn PDF document text
    • https://gryps.de/images/how-to-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://gryps.de/images/free-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • https://gryps.de/images/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • https://gryps.de/images/free-robux-discord_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000342c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x342C 25704 bytes
SHA-256: d7791c5fcb91a27f4a38190d191d869f09a12ab273163b5c24e275c367a2937f
font_01_sfnt_off00006e4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E4F 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00007800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7800 18052 bytes
SHA-256: 52b27d49d658c5dd219fe1685a79a71966a386845fdc62a41335e5719e4d5001

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