Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b4bf6a0d08d35cb…

MALICIOUS

PDF

34.7 KB Created: 2021-07-03 16:45:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 47f16727f25f5130e233b6a0aef2b333 SHA-1: c87d546ccf804f586de72843e2e1366c8cadd452 SHA-256: 8b4bf6a0d08d35cb9ee483f21974d059cee4d411233a7272f25c703da5031444
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 0.9980

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-com-game-hack PDF link annotation
    • http://lib.uho.ac.id/library/repository/free-minecraft-skins-pc_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-minecraft-gift-codes_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-facebook-hack_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-hack-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/robux-hack-no-survey-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-robux-only-username_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/hack-coin-master-apk-ios_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-hack-online_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/how-to-get-free-followers-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/good-roblox-hack-exacuter_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/haktuts-2021-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-free-fire_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/oprewards-com-earn_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/are-there-any-roblox-hacks-that-actually-work_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_off00003272.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3272 22000 bytes
SHA-256: 1e933cdedb2c00b1b669ac31657350f8f44657803039353897a83980ed760e5b
font_01_sfnt_off00006314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6314 18976 bytes
SHA-256: 20782bd0acfe52469dc9f14a315b4aee1c9563688044d1d6d3a516ef71528a8c

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