Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c32f82b7124c25a…

MALICIOUS

PDF

45.5 KB Created: 2021-06-11 06:27:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c04b75207c9e92769ecda58648711a5f SHA-1: dbd9c53a32b5f379fa8f80238fecf6f1c807435f SHA-256: 4c32f82b7124c25a7bd479fe30331e78b510c80c583c0babf563a4a235699506
162 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 fake-CAPTCHA lure and a password-protected-archive 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 0.9864

Heuristics 6

  • 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.
  • 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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/roblox-how-to-get-free-robux-on-ipad-2021-game-hack PDF link annotation
    • https://library.itn.ac.id/perpusitn/repository/roblox-free-clothes-girl_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-minecraft-account-and-password_GM479516143.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-cheats-free_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/no-verification-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/spins-coin-master_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/is-java-minecraft-free_GM479516143.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-ful-colour-brown-pant-roblox_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/windows-10-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-to-get-free-robux-easy-way-2021_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-free-spin-whatsapp-group-link_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/minecraft-free-apk_GM479516143.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/best-way-to-get-robux_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-exploit-free-executor-2021-september_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/tiktok-free-views_GM835599320.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-stuff-on-roblox-catalog-2021_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-100-spin_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-roblox-characters_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-spins-coinmaster_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-rainbow-wings-free_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050e3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50E3 25420 bytes
SHA-256: 904f32a5e0691a957ad6512617b18b7c8ca66fab2d26ca8a6ed99d9bb7c7d7d1
font_01_sfnt_off00008c11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C11 19336 bytes
SHA-256: a1a2e8dccec3290999a5b55430bb88945ca8ddad3e2a7baaced47796d1a4852a

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