Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f66a67debc9c513…

MALICIOUS

PDF

34.6 KB Created: 2021-07-05 10:45:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 6f49cc2bea32b2b7036b0bb4e3f93eab SHA-1: e1b74a5b734442bec26a5a9d4b439b0370637d92 SHA-256: 1f66a67debc9c513ad5893f3155104470a9f57556d8bb8018f802c6beb7604f3
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. The embedded URL, http://netcdn.tw/app/431946152/hack-robux-game-hack, is the primary indicator of malicious intent. The document body and numerous other URLs reinforce the theme of game-related hacks and cheats, likely serving as a lure to trick users into visiting the malicious site. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/hack-robux-game-hack PDF link annotation
    • http://lib.mbp.ac.id/repository/hacks-minecraft_GM479516143.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/how-to-get-past-free-robux-roblox-hack-survey_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/hacker-skin-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/get-free-roblox_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/roblox-avatar-tester_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/coin-master-free-spins-hack-but-no-surveys_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/free-coins-app-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/how-to-get-more-robux_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/how-to-get-a-free-pokemon-go-account_GM1094591345.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/coin-master-free-spin-realme-products_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/unlimited-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_off000030c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30C9 22508 bytes
SHA-256: 14215e471d8b7d02a313e8b0ef195c434c808ab022d2cb95ce80eaf8d487629b
font_01_sfnt_off0000633d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x633D 18724 bytes
SHA-256: 3ac7be5af293af38fa349e44a35dc9d744ccac9489df6a6de684f68f531fa54d

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