Malicious PDF — malware analysis report

Static analysis result for SHA-256 0de8aff20d73cf66…

MALICIOUS

PDF

35.2 KB Created: 2021-07-03 22:33:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: c88944cd4ed260b687c70de7d72e323e SHA-1: ff3c1ac94a5aef87c51aa42e5bf685ceaa569377 SHA-256: 0de8aff20d73cf66fc0207d80050ff6e3922b9e0acb5a342fe363fc4941c97d0
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are disguised as generators or hacks for popular games like Roblox and Minecraft. The primary lure appears to be 'free Robux', a common tactic in phishing and scam campaigns. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a malicious intent to redirect users to potentially harmful sites, aligning with a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/431946152/free-roblox-accounts-with-robux-that-work-not-banned-2021-game-hack PDF link annotation
    • http://slim.sisminkada.net/repository/coin-master-gameplay_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/giving-away-free-robux-live_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/coin-master-free-spins-gratis_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/roblox-hack-hackerbot_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-minecraft-windows-10-account_GM479516143.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/hack-roblox-lumber-tycoon-2-money_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/roblox-website-robux_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/cheats-for-snow-shovelling-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-military-shirt-templates-on-roblox_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/how-to-hack-on-roblox-script-injector_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/hack-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/how-to-hack-on-roblox-wolf-games_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-robux-penut_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/roblox-black-panther-shirt-free_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/roblox-free-items-game_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_off00003272.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3272 21528 bytes
SHA-256: 752aaa6789baf0b9837030e2235e2b5420fa8eea0c56020eaf9916ee06cb5608
font_01_sfnt_off0000615c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x615C 20124 bytes
SHA-256: e8dc8af608a2467c92ba912a1f660b74916591188ffd601a7d8b89018af53e3a

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