Malicious PDF — malware analysis report

Static analysis result for SHA-256 c08b2d55cc9cc7b4…

MALICIOUS

PDF

34.1 KB Created: 2021-07-06 07:13:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 42fd71dd8f204dfdec9ed3fb89adfd7e SHA-1: c93bd6ad931d1069cd552c9fd8702257cf2974b0 SHA-256: c08b2d55cc9cc7b4f49f10cf0520478bdcc7380779342f96985e1f13ede8b06b
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, primarily related to 'free Robux' and game hacks, indicating a lure-based phishing or scam campaign. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs further supports a malicious intent to redirect users to potentially harmful sites. No scripts were extracted, but the document's structure and content point towards a social engineering attack.

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-co-game-hack PDF link annotation
    • http://perpus.fisip.unnur.ac.id/repository/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/coin-master-cheats-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-spins-and-coins-com_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/www-hacker-ed-robux_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-robux-giveaway-live_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/cruise-ship-tycoon-cheat-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/roblox-games-that-cheat-engine-works-on_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/how-to-hack-roblox-pepol-haeds-of_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/coin-master-daily-bonus_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/best-script-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/how-to-hack-in-somebodys-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/april-fools-hack-2021-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/como-tener-robux-gratis-2021-sin-hack_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/kazok-youtube-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/ninja-animation-package-roblox-free_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/how-do-you-become-a-hacker-on-roblox_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_off00003012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3012 22572 bytes
SHA-256: 952b74c04be149a1e72367a9242441903dacb06d4f92adac78ea108eaeb7982e
font_01_sfnt_off0000612f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x612F 18716 bytes
SHA-256: ae86725dd70d168e8b5a24377d7effb3bd88f81667aa3e091abc0f5759eb354b

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