Malicious PDF — malware analysis report

Static analysis result for SHA-256 3043bfddba1ca40e…

MALICIOUS

PDF

47.7 KB Created: 2021-06-03 10:05:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 0d03e0442dbb18adc525be5d0151cd1c SHA-1: 1498fda8b1c85b0a30a8d2a0de31b74c1575edf4 SHA-256: 3043bfddba1ca40e615504367e253e16d5821b16d0bc150aecec5a14ca9b0038
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9818

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 https://netcdn.online/app/431946152/free-robux-giveaway-live-stream-game-hack PDF link annotation
    • https://lib.stie-yai.ac.id/repository/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/robuxglobalcom-no-verification_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/coin-master-hack-apk-35-11_GM406889139.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/how-to-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/coin-master-spin-link-today_GM406889139.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-robux-codes_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/roblox-hack-app_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/tiktok-views-free_GM835599320.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004de1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DE1 26560 bytes
SHA-256: f0504b10009950e6337f7c3fe225c778a89b105f93857e7a46c558178a767b9e
font_01_sfnt_off00008b51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B51 2832 bytes
SHA-256: 78e89c8f621d90011ffb7a2107d701d4cdf090a2f2cf42d5a65297289afc8805
font_02_sfnt_off00009502.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9502 19184 bytes
SHA-256: 7446ba3e706e3a2caf3d69193d5e124c76d334f3d02e128a22f293d49189f2d0

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