Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c972b3ebe8d3409…

MALICIOUS

PDF

34.8 KB Created: 2021-07-03 20:47:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 5ce43fd9d95980d6b25711dd09b7b6fd SHA-1: 9723a00b1c4a156971d29549b85c503ece34b346 SHA-256: 0c972b3ebe8d34092b5704385d0c62f9d479f1b9f8b7739b9116a107ec98cefb
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-severity heuristic firing for a 'GAME_HACK_REDIRECT_LURE' pointing to a URL associated with free Robux and game hacks. The ML classifier also flagged this PDF as malicious with high confidence. The embedded URLs and document body content reinforce the lure of obtaining free in-game currency, a common social engineering tactic to trick users into visiting malicious sites.

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-robux-working-game-hack PDF link annotation
    • http://daskrimti-jabar.web.id/library/repository/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/ho-wot-not-get-kicked-for-hacking-in-roblox_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/coin-master-spin-hack-pc_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/tinyurl-free-robux_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/free-tay-k-roblox-shirt_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/free-free-robux_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/free-robux-no-email_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/coinmasterfreespins_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/roblox-admin-hack_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/free-spins-on-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/free-roblox-invitation_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/free-fortune-roblox_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/best-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/how-do-you-change-your-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/real-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/roblox-custom-script-executor-free_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_off00002fdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FDF 22776 bytes
SHA-256: 556a7015598905c6002b75ba39e984e0464c6e3715e466c746fda5a3621e3325
font_01_sfnt_off00006287.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6287 19204 bytes
SHA-256: ce738487085ad599441484df9d90a1a143049edc5affa9a85a5d558c4f13480e

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