Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cb1d048681d05e5…

MALICIOUS

PDF

35.3 KB Created: 2021-06-28 13:35:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 8fcaba2b41953c8e540fbec955422245 SHA-1: ad087a9588fe291c5e3a185efb88fdbd13a49626 SHA-256: 9cb1d048681d05e58ba7cad4b8ebf66cdc45e454f4de57a41a30b78afd3aba12
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-confidence heuristic indicating it links to a 'free generator / game hack' redirector, specifically mentioning 'free Robux'. The document body and extracted URLs reinforce this lure. While no scripts were explicitly extracted, the nature of the lure suggests a potential for JavaScript execution or redirection to a malicious site designed to exploit user interest in free in-game currency.

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.co/app/431946152/free-robux-summer-rewards-game-hack PDF link annotation
    • http://digilib.stie-yppi.ac.id/repository/how-to-hack-john-does-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/roblox-apocalypse-rising-hack-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/minecraft-creative-mode-free_GM479516143.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/roblox-free-pets-in-pet-simulator_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/a-free-robux-code_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-minecraft-thumbnails_GM479516143.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-to-get-free-minecraft-alts_GM479516143.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-roblox-clothes-codes_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/roblox-hackers-list_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/coin-master-hack-without-verification-for-iphone_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/roblox-demon_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/roblox-hack-scripts-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/roblox-cheat-engine-and-ccv5-bypass-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/como-obtener-robux-usando-cheat-engine-66_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/roblox-hack-for-robux-kredi_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/blox-world-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_off0000308b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x308B 22916 bytes
SHA-256: e85022a0d215ec03be2d3805574e45508f721ee4720fd3e09c96b07dcae8205d
font_01_sfnt_off0000640f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x640F 19312 bytes
SHA-256: b917397e70b7435a33bbcaad88339a7dd8248fe17da57047181e0178879f49b2

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