Malicious PDF — malware analysis report

Static analysis result for SHA-256 d31b4bcdf0d0b43d…

MALICIOUS

PDF

36.4 KB Created: 2021-07-03 13:49:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 6fc745d808f881d7286aed45b8d951d6 SHA-1: fc22eef9638622772ac3a2ce755cbdce639ab50c SHA-256: d31b4bcdf0d0b43dfba2854871073bf50c66b6bb463cca902d993295739cb67f
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-instantly-game-hack PDF link annotation
    • http://fkunismuh.org/perpustakaan//repository/free-robux-glitch-2021_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/how-to-get-ninja-animation-for-free-roblox_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/free-roblox-items-codes_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/roblox-lumber-tycoon-tg-hacks_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/hack-master-coin_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/to-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/earn-robux-today_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/roblox-hack-scripts-pastebin_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/robux-free-eazy_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/no-scam-free-robux_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-robux-no-human-verification-or-survey-2021-safe-website_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/hack-to-get-20210-robux-2021_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-minecraft-mods-for-xbox-one_GM479516143.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/coin-master-guide-to-free-spins-and-rewards_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/coin-master-get-free-cards_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/free-item-codes-in-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_off000036ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36EA 22524 bytes
SHA-256: 4e2f3f5d16e9d30892501fd434c1bf7a71f3da4f888b9ddeafb71bd4aa20574e
font_01_sfnt_off00006943.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6943 19072 bytes
SHA-256: 2ca9d11195de567abf4a703037006073732e9aee935d3c5754ca148439903055

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