Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a868128597c3c50…

MALICIOUS

PDF

35.7 KB Created: 2021-06-25 21:19:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3357b3310539cea883148a051955cffc SHA-1: 186c5f067f8de6c736ef4a4ae4d170f1a2095fa6 SHA-256: 3a868128597c3c50080eea7c64e20966d5d6b56f501efc769afcd90b2e3a1193
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.co/app/431946152/best-way-to-get-free-robux-2021-game-hack PDF link annotation
    • http://perpus.fisip.unnur.ac.id/repository/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-spin-coin-master-link-today_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/pokemon-go-free-7km-eggs-june-2021_GM1094591345.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/coin-master-hack-xyz-2021_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-spins-on-coin-master-cheat_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/how-to-get-free-cards-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-group-funds-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-robux-generator-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/coin-master-free-spin-and-coin-link-2021-today_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-roblox-itrems_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/como-evitar-que-un-hacker-te-hackee-en-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/hacking-roblox-copyright_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/claim-robux_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/draw-free-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/how-to-hack-roblox-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_off0000309e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x309E 23068 bytes
SHA-256: 4f70eb06a29b728707272b2f7ca9536536d960f6e88f7c9d679201d3b8fd05cb
font_01_sfnt_off000064cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64CF 19600 bytes
SHA-256: 4cb8c4e04e3d13902cf1a0f45ac9bc275f9434ec7ffa4eee008c88643510b64c

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