Malicious PDF — malware analysis report

Static analysis result for SHA-256 f13864ec3194cb98…

MALICIOUS

PDF

34.5 KB Created: 2021-07-07 14:59:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 89e935eaca0917a0d7d1c56e6be1e162 SHA-1: 18d5c9658cf07094291aed94fde9b3bd01368695 SHA-256: f13864ec3194cb981317f293da6463a026eb781aa44444faf7f6ebeae129639b
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/479516143/minecraft-free-no-virus-game-hack PDF link annotation
    • http://www.pspmrsmkkb.com/webopac/repository/minecraft-java-hacks_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-bonus_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/hack-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/how-to-hack-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-free-gift-link-2021_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-robux-dowload-torrent_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/how-to-hack-roblox-sword-fight-on-the-heights_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/easytofindme-roblox-hack-script_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/roblox-xyz-hack_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/rbx-land-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/tiktok-free-wala-video_GM835599320.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/how-tto-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/noclip-hack-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/robux-offer-wall_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/how-to-aimbot-hack-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/master-coin-free-spin_GM406889139.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_off00003385.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3385 22056 bytes
SHA-256: 3f2982ea0b31eebe605ffefa8781d25c3b2b0a4ad5f290cb4b8a3974e609bf50
font_01_sfnt_off00006424.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6424 18272 bytes
SHA-256: bf996c983106b115fd3bd2435b69e5e984477bc90884b46e6e1560a3bcd683fa

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