Malicious PDF — malware analysis report

Static analysis result for SHA-256 043525c2b4081477…

MALICIOUS

PDF

41.0 KB Created: 2021-05-21 23:37:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: bd519953325810d6faaf84c1c3b82b11 SHA-1: 2ff4773c674734519efcaf40dcd3db50fff3a8c0 SHA-256: 043525c2b4081477f55591b1eceacccd38bf559af1483037593ce0b4e1624617
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 0.7508

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-no-human-verification-game-hack PDF link annotation
    • http://www.gox.pt/images/free-roblox-toy-codes_GM431946152.pdfIn PDF document text
    • http://www.gox.pt/images/coin-master-free-400-spin-link_GM406889139.pdfIn PDF document text
    • http://www.gox.pt/images/minecraft-free-play-no-download_GM479516143.pdfIn PDF document text
    • http://www.gox.pt/images/free-robux-app_GM431946152.pdfIn PDF document text
    • http://www.gox.pt/images/coin-master-free-spins-today-39_GM406889139.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_off0000333a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x333A 28504 bytes
SHA-256: 891acef1095e7ac54a34125a0469c1bfd37196613ecd18a1c118755eb4cf4411
font_01_sfnt_off000072e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72E2 2880 bytes
SHA-256: 106de1d187d148d03f5c34a802444a7e62d93662ddf359d17cd55770c6c16081
font_02_sfnt_off00007cd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CD2 19024 bytes
SHA-256: add4238412854312c544fb77f8d10d54d15c3f72dfb550af23f9090805c2c756

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