Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f1cecbd5bb80bc9…

MALICIOUS

PDF

34.8 KB Created: 2021-07-02 07:19:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: a95a1183b7cc83b2a411c3d329fb440c SHA-1: 409c032efe7190d93b17c62541443056bf3eebc5 SHA-256: 5f1cecbd5bb80bc99036e342763ed54e85c4246baa64c341b6bfef7a13eaf4cc
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/406889139/how-to-get-free-pet-snacks-in-coin-master-game-hack PDF link annotation
    • https://www.advancissurgical.com/uploads/files/files/tiradas-coin-master_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/roblox-hack-btool-2021_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/hey-google-show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/fire-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/como-usar-cheat-engine-67-no-roblox_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/minecraft-free-minecraft_GM479516143.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/coin-master-hack-2021-apk-download_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/how-to-get-free-coins-on-tiktok_GM835599320.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-robux-survey_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/today-coin-master-spin-free_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/how-to-get-free-coins-on-assassin-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/how-to-get-minecraft-dungeons-for-free_GM479516143.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/minecraft-marketplace-free_GM479516143.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/get-free-robux-now_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/how-to-get-free-robux-no-youtube_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/mcpe-master-hack-coin-apk_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/how-to-really-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/how-to-hack-a-roblox-player_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-robux-games-that-actually-work-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_off00003245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3245 22680 bytes
SHA-256: 5f53c6b16025f44eeb122905c957a5976a54934eccb20ef2e74713f59f5f013c
font_01_sfnt_off000064f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64F8 18488 bytes
SHA-256: dc7c646882044380c05e310eca6d356781535c57437de66a7a79350adab1da5b

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