Malicious PDF — malware analysis report

Static analysis result for SHA-256 c00ab77b655625cf…

MALICIOUS

PDF

33.9 KB Created: 2021-07-05 08:35:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 353f0771cb87b82cd2a6c28560d844e4 SHA-1: 95a56ff905b3b24b52d37be852f8f8ece0c87fb5 SHA-256: c00ab77b655625cf89796d57d666586ae4782955f9f4b9a185241fab61fc37d7
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document employs a common lure of 'free Robux' and game hacks to entice users. It contains multiple embedded URLs, with the primary one being http://netcdn.tw/app/431946152/roblox-robux-generator-2021-game-hack, which likely leads to a malicious site or download. The ML classifier strongly flagged this PDF as malicious, supporting the observed lure and redirection behavior.

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/roblox-robux-generator-2021-game-hack PDF link annotation
    • http://chem.ipb.ac.id/kim/repository/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/wurst-minecraft_GM479516143.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/easy-robux-hack_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-hack-tool_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/how-to-get-free-robux-from-roblox-games_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-2021-free-spins-link_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/how-to-hack-roblox-accounts-july-2021_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-free-spins-hack-link_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-hack-game-download_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/roblox-its-free_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-spins-coin-master-twitter_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/roblox-hacks-vermillion_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/hack-para-robux-gratis-2021_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/how-to-get-wings-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/robux-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E74 22044 bytes
SHA-256: 92b8d584850fdd265183e6622b86092da0dc449c4bae8562421f46c4e805b8ab
font_01_sfnt_off00005eff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EFF 19132 bytes
SHA-256: 6401bcd129901e19178bc0ea301a18cd362f26daf5d55f3217fd4f2a50f8f5de

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