Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbe5d110ff1068bb…

MALICIOUS

PDF

34.8 KB Created: 2021-07-05 20:13:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 1f95f14d5196696855a64ff958c45955 SHA-1: 3c0c9b3e1044891da8a6cf5eed24bef730e420a9 SHA-256: fbe5d110ff1068bbe6c0be28e86a117612d2ee1814414a1813c97985be395f56
200 Risk Score

Malware Insights

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

This PDF document employs a lure of free Robux and game hacks to trick users into clicking malicious links. The document contains a fake CAPTCHA or human verification prompt, designed to coerce users into interacting further. The primary malicious link identified is http://netcdn.tw/app/431946152/free-robux-survey-game-hack, which is hosted on known malicious redirector infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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
  • 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.tw/app/431946152/free-robux-survey-game-hack In PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/how-to-hack-to-get-admin-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/how-to-get-free-skinss-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/unjailbreak-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/nuevo-hack-de-robux_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/free-minecraft-packs_GM479516143.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/roblox-cheat-engine-esp_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/how-to-hack-for-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/coin-master-mod-version-free-download-34-4_GM406889139.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/roblox-lua-hack-scripts_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/free-roblox-robux-generator-no-survey-hack-tool_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/daily-coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/how-to-get-free-bc-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/buy-tiktok-followers-free_GM835599320.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/dragon-ball-ultimate-roblox-max-stats-hack_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_off000031e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31E7 22032 bytes
SHA-256: 9e2f4bb5830228eee3fccf8a841eb806db324e123b336ac738f2d7be930fb707
font_01_sfnt_off000062e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62E1 19012 bytes
SHA-256: c0541a5d6200ab17734b4952abc6c0a8b533a715d99044a6ee13c1a52db76e39

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