Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab2f57b0da06b6ff…

MALICIOUS

PDF

37.1 KB Created: 2021-07-04 17:54:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: ad7a898349bd773e23ebced68edc60c9 SHA-1: 7f64446f01cee442c844713da94c0664267f4c10 SHA-256: ab2f57b0da06b6ff303facda24f3fad131c44feb1fe7e5feebc57ab55f534526
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that are disguised as game hacks or free currency generators. The primary URL, http://netcdn.tw/app/406889139/coin-master-free-spins-link-no-verification-2021-game-hack, is flagged as a redirector lure. This indicates the document's purpose is to trick users into visiting malicious sites, likely for credential harvesting or malware distribution. No scripts were extracted, but the PDF structure and embedded links strongly suggest a phishing or 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/406889139/coin-master-free-spins-link-no-verification-2021-game-hack PDF link annotation
    • http://lib.stimykpn.ac.id/repository/free-robux-website_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/pro-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/hacker-decal-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-tampermonkey-hack_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/hack-de-roblox-robux-infinitas_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-tower-battles-cheats_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-robux-only-username-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-kick-players-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/coin-master-online-hack-tool_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-free-name-change-hack_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-books-free_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-minion-game-hacked_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-hack-cheats-online-generator_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/hack-a-backdoor-into-a-roblox-game_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/krnl-download_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/robux-gift-codes-free_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_off000038ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x38AE 23120 bytes
SHA-256: 84bef6f35462bde1b7b50c0bed76a5c403253af3606157bcb364c7a27c6d72f1
font_01_sfnt_off00006caa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CAA 18880 bytes
SHA-256: 959a402348cf5c915c560357ecab6e8019ade4de046d620f98c663afb78237ce

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