Malicious PDF — malware analysis report

Static analysis result for SHA-256 38b858952620559b…

MALICIOUS

PDF

46.2 KB Created: 2021-06-09 12:45:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 5c8a4eed41b3fc7fc293efe155a2a47a SHA-1: 0b91659940c7f938b6391b821a1b3f4f023fea5f SHA-256: 38b858952620559b906c67fc126c023d3b53b8326ea75a72600f37617b2eeb60
122 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure and a link to a website promising game hacks, indicating a social engineering attack. The embedded URL points to a suspicious domain likely used to host malicious content or further phishing attempts. The ML classifier also flagged this PDF as malicious.

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/free-unlimited-robux-weebly-game-hack PDF link annotation
    • https://opac.umrah.ac.id/repository/robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-mod-version-free-download-ios_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-bux-free_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-roblox-no-password_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/tiktok-free-view-30-detik_GM835599320.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-minecraft-skin-creator_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/scary-larry-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-hack-m-coins-mcpe-master_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/minecraft-fly-hack_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/minecraft-free-download-mac_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/robux-now_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-free-someone-in-prison-life-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-its-free_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-codes-on-camera_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_off000051b9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51B9 27216 bytes
SHA-256: 12d2e8105ea039aef8e726a97d3551f1e618ea2140c811e6910a533362a084e9
font_01_sfnt_off00008f1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F1B 19308 bytes
SHA-256: 5b8b050999f4084a8c35007d687e3b72ff54e133d61f0a02e976690f23626ec3

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