Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b1f4a41b9bcf380…

MALICIOUS

PDF

35.3 KB Created: 2021-07-09 05:47:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 88e75857769d1fa8757c7a90bbbfccf4 SHA-1: f6836d7d94975366b52c008f0e32e3cc6d431e1c SHA-256: 2b1f4a41b9bcf380f267f15053443dfae129d4d8f880fb3854c17c471e660a3e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, including one pointing to a 'roblox-robux-generator' and other game hack lures. The document body and heuristics indicate a redirection to potentially malicious websites designed to trick users into downloading malware or providing personal information. No scripts were extracted, but the presence of numerous game-related lures suggests a social engineering tactic.

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-http-freerobuxgenerator-xyz-game-hack PDF link annotation
    • http://lib.stimykpn.ac.id/repository/free-robux-clothes_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-hack-tool-without-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/extra-ultra-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/hwo-to-create-a-roblox-game-for-free_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-promo-codes-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/download-app-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-2021-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-roblox-money_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-fly-hack-download_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/is-minecraft-free-on-switch_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-coin-master-hacks-no-verification-or-survey_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-free-spins-and-coins-without-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-hack-a-roblox-accounts-2021-on-pc_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/best-free-roblox-exploitds_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-tiktok-views_GM835599320.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
stream_002_off0000311c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x311C 22672 bytes
SHA-256: 9a9685ea5be28fa5521a967c75439d869fead68db80aee570550b656f365ccc0
font_01_sfnt_off000063de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63DE 19332 bytes
SHA-256: 3847149b477a4e2ba4f9248fde2909885d2401f9abbab2c284e38936ec39ea88

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