Malicious PDF — malware analysis report

Static analysis result for SHA-256 19108c8120fb7411…

MALICIOUS

PDF

35.5 KB Created: 2021-06-20 12:32:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: fa522c1da392639efde13bafbfba6fb3 SHA-1: 86d122b929886ad41dd34eb883bec5ae3880032c SHA-256: 19108c8120fb7411997e8b6c94768adb41d0bee55459e6e2c887d7579447cbdb
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 0.9985

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/how-to-hack-robux-with-robux-generator-game-hack PDF link annotation
    • http://sttlets.education/senayan//repository/free-shirt-templates-roblox_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/island-royale-roblox-hack-esp_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/how-to-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/free-roblox-clothes_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/how-to-get-uc-and-bp-in-pubg_GM1330123889.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/robux-hack_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/minecraft-windows-10-hack-client-2021_GM479516143.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/coin-master-hack-tool-for-pc_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/roblox-trailer-its-free_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/free-links-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/best-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/blox-supply-free-robux_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/coin-master-free-coins-link-facebook_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/free-robux-generator-no-offers_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/roblox-dragon-ball-z-final-stand-cheat_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/coin-master-free-spins-link-download-hack_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/how-to-get-free-robux-on-pc-no-human-verification_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/wurst-18_GM479516143.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_off0000312d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x312D 23088 bytes
SHA-256: bd7ce17c82c8770316d9dec80e8618526caa76950a626a90b5b9db07e233d119
font_01_sfnt_off000064ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64AC 19472 bytes
SHA-256: d1bf4828147c7ed1cd5c6617fbf2bceb473f9b1da9ec156c3b9e78e0a9e4e632

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