Malicious PDF — malware analysis report

Static analysis result for SHA-256 91fc38f75cb3bbde…

MALICIOUS

PDF

34.8 KB Created: 2021-07-05 21:58:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: a2ed853c3a4c33f39f616e498c61e7a3 SHA-1: 539741e9c2fcd57485659c8e3889bf58663945c9 SHA-256: 91fc38f75cb3bbdef9f4774a537337d3a66d4e57ff4c598978362a5bbc5bc449
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous links to external websites, primarily offering game hacks and generators, which is a common lure for phishing or malware distribution. The primary URL, http://netcdn.tw/app/835599320/tiktok-vs-free-fire-game-hack, is flagged as a redirector for game hacks. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest a potential for JavaScript execution (T1059.007) to facilitate the redirection or download of further malicious content, aligning with a spearphishing attachment tactic (T1566.001).

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/835599320/tiktok-vs-free-fire-game-hack PDF link annotation
    • http://fkunismuh.org/perpustakaan//repository/coin-master-hack-2021-apk_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/roblox-place-rewards_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/hack-the-coin-master_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-minecraft-account-and-password-2021_GM479516143.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/hacker-roblox-games_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/roblox-free-pokemon-go_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/bux-gg-robux-free_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/pokemon-go-free-games_GM1094591345.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/master-free-spin-and-coin-links-html-m-1_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/robux-survey_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/free-robux-2021_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_off00003191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3191 23224 bytes
SHA-256: c92ee7ab40bddb8d1951cf7e8b3ceaa8ab4f55746f82b3accd04945a933bf0e4
font_01_sfnt_off00006602.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6602 18108 bytes
SHA-256: 0da46590636ae5fc9211fdcf2e7853349e72d9cbc1761429bc60646a1fc405d2

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