Malicious PDF — malware analysis report

Static analysis result for SHA-256 839d9e4b196afdeb…

MALICIOUS

PDF

33.2 KB Created: 2021-07-20 21:42:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 481ede77643a830f8dd09fe5684c0c83 SHA-1: 9e8c1da6ab492e8aea474dceddc46c6c714abc12 SHA-256: 839d9e4b196afdeb3f41d12bba1b36171fdf18fb48753ff3b1f427a09136b676
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 0.9942

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 http://netcdn.tw/app/479516143/free-mods-for-minecraft-pe-game-hack PDF link annotation
    • https://gryps.de/images/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://gryps.de/images/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • https://gryps.de/images/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • https://gryps.de/images/free-tiktok-accounts_GM835599320.pdfIn PDF document text
    • https://gryps.de/images/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • https://gryps.de/images/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • https://gryps.de/images/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://gryps.de/images/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • https://gryps.de/images/free-minecraft-account-generator_GM479516143.pdfIn PDF document text
    • https://gryps.de/images/robuxy-com-free-robux_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
font_00_sfnt_off00002e00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E00 22628 bytes
SHA-256: 0d7c3437f2b07ec26cefbba055142d5efbd3f3653d7e1e0e9bc91ad90b0a205d
font_01_sfnt_off00006082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6082 18040 bytes
SHA-256: 55677d50e7f19372d6dfb723d72c398dee248f925afb4425ab44c3bb4ecd28f4

Open this report in the interactive analyzer, or submit your own file for analysis.