Malicious PDF — malware analysis report

Static analysis result for SHA-256 f17df9ff2cfef922…

MALICIOUS

PDF

44.1 KB Created: 2021-06-09 10:55:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 76d03471271fae666e6cdca8a353682a SHA-1: dfb71a5772efebf4c283d5313b27a51f48b44a9f SHA-256: f17df9ff2cfef9223684d7bb43a43148cd7443390cd4a83b38eaeb51ac60e7c7
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by an ML classifier. It uses a security-bypass lure. 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 0.9865

Heuristics 5

  • 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.
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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/hack-adopt-me-roblox-game-hack PDF link annotation
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/robux-com-free_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/free-tiktok-followers-without-verification_GM835599320.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/free-roblox-clothes-boy_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/free-cinema-4d-lightroom-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/free-minecraft-accounts-2021_GM479516143.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/free-robux-script_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/ajc-tech-free-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/free-robux-website_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/how-to-intsall-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/free-robux-generator-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/hack-midoriya-full-cowl-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/free-disney-plus-accounts-tiktok_GM835599320.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/cheat-engine-lua-scripts-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/april-2021-hack-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/minecraft-java-edition-free-trial_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_off0000504f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x504F 24376 bytes
SHA-256: 97997dfa9d6c1ff838462d4c5831a9785616b1f3dcc2d4bbd541bc8aeca95485
font_01_sfnt_off00008801.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8801 18832 bytes
SHA-256: 4507efbe2a9f22b48cf12ae0207b1047991aade68488e3b8893e9b3e0d65d268

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