Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c47a7f028fbb89f…

MALICIOUS

PDF

47.5 KB Created: 2021-06-11 05:02:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: cf5ec50d2179893aea9f670133aa0f56 SHA-1: f6da59e1c128f671c77c4a9494470a42528bed5f SHA-256: 4c47a7f028fbb89ff4ac71637883d7902eb4e6a3a3ee21682843a1135d96e696
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 0.9832

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 https://netcdn.tw/app/431946152/hey-google-how-do-you-get-free-robux-game-hack PDF link annotation
    • http://elearning.mamduh.my.id/__statics/gudangsoal/files/hack-work-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mamduh.my.id/__statics/gudangsoal/files/free-robux-for-everyone_GM431946152.pdfIn PDF document text
    • http://elearning.mamduh.my.id/__statics/gudangsoal/files/how-to-get-admin-on-roblox-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://elearning.mamduh.my.id/__statics/gudangsoal/files/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://elearning.mamduh.my.id/__statics/gudangsoal/files/roblox-jailbreak-money-hack-2021-download_GM431946152.pdfIn PDF document text
    • http://elearning.mamduh.my.id/__statics/gudangsoal/files/roblox-phantom-forces-level-100-hack_GM431946152.pdfIn PDF document text
    • http://elearning.mamduh.my.id/__statics/gudangsoal/files/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://elearning.mamduh.my.id/__statics/gudangsoal/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mamduh.my.id/__statics/gudangsoal/files/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mamduh.my.id/__statics/gudangsoal/files/minecraft-realms-free-codes_GM479516143.pdfIn PDF document text
    • http://elearning.mamduh.my.id/__statics/gudangsoal/files/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://elearning.mamduh.my.id/__statics/gudangsoal/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mamduh.my.id/__statics/gudangsoal/files/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://elearning.mamduh.my.id/__statics/gudangsoal/files/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mamduh.my.id/__statics/gudangsoal/files/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mamduh.my.id/__statics/gudangsoal/files/get-me-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mamduh.my.id/__statics/gudangsoal/files/how-to-download-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • http://elearning.mamduh.my.id/__statics/gudangsoal/files/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://elearning.mamduh.my.id/__statics/gudangsoal/files/hacks-for-roblox-pastebin_GM431946152.pdfIn PDF document text
    • http://elearning.mamduh.my.id/__statics/gudangsoal/files/free-robux-com_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_off0000534b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x534B 28612 bytes
SHA-256: 19ea8d5b29c999faae5a19d78d5610d5b7cb75e7d8d571048d9731f2a4e64ee2
font_01_sfnt_off0000945b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x945B 19156 bytes
SHA-256: 2eaf05fb5b81c851c34d40d7c07e26ddd9b324a9c4f95fd917841cb6815dc612

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