Malicious PDF — malware analysis report

Static analysis result for SHA-256 f33ea71698dd0074…

MALICIOUS

PDF

45.5 KB Created: 2021-06-11 11:16:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: a27605fcd1815ecf6f8df86ce816ef4f SHA-1: 80eb878866eb531b45fc89d28013ed97e17b667c SHA-256: f33ea71698dd00740898694ac3f36e00ce908a427beb2630054841e3c15d8201
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA 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 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.
  • 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
  • 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/clicker-hacked-roblox-game-hack PDF link annotation
    • http://libnh.stikesnh.ac.id/repository/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/demon-roblox_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/coin-master-hack-online-link_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/coin-master-free-bonus_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-coin-spin_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-robux-no-download_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/counter-blox-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/how-to-get-free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/hack-coin-master-apk-32_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/coin-master-hacks-for-android_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/roblox-comroblox_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/hacks-for-minecraft-bedrock_GM479516143.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_off00004e9e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E9E 29480 bytes
SHA-256: e63159012f8eb5c6e82105c06be1137e94221dc26913a7a64c051c3574e3c004
font_01_sfnt_off00008e7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E7B 18476 bytes
SHA-256: 244c2a7716965da4cf896992425a0449ff914f91683b88f22bff0234f4d19c81

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