Malicious PDF — malware analysis report

Static analysis result for SHA-256 427ca8531be2add4…

MALICIOUS

PDF

32.9 KB Created: 2021-07-05 08:14:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 3aba7f3e1b46fddc7738e18cd247b8f0 SHA-1: 5a6baa2c9a31b206abcdd043efedb568b1aa0d72 SHA-256: 427ca8531be2add48bec8485596ab6cdb33f6dddd088a5b809d1ee0339b62afb
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, with a primary focus on luring users to a 'coin-game-game-hack' site. This indicates a social engineering tactic to trick users into visiting potentially malicious websites, likely for malware distribution or credential harvesting. No scripts were extracted, but the presence of numerous game-related lures suggests a common phishing or scamming campaign.

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/406889139/coin-game-game-hack PDF link annotation
    • http://library.persadabunda.ac.id/repository/rewards-roblox-com_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/roblox-exploit-scripts_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-free-spin-and-coins-links-home_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/how-to-change-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/app-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/adf-ly-robux-hack_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/roblox-free-clothes-girl_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/infinite-money-hack-boku-no-roblox_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/all-coin-master-spin-link-and-free-download_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-hack-2021-apk_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-robux-script_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/how-to-hack-coin-master-using-es-file_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-free-spins-2021-hack_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/roblox-play-as-guest-free_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/real-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/roblox-hackers-list_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
stream_002_off00002cf6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2CF6 22364 bytes
SHA-256: 05706eb7fe26b1bdfb77112cd8991cef0c825929535ffc394d7bd50c52f361f7
font_01_sfnt_off00005eb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EB7 17992 bytes
SHA-256: a7264c3c7d6dbb8894c9c5f7704632181e93db6105eaa58c487aff56e0d4070b

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