Malicious PDF — malware analysis report

Static analysis result for SHA-256 94f876cd370f011f…

MALICIOUS

PDF

43.6 KB Created: 2021-05-10 23:00:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 5c273d9cfe5cec8027f4ba665deaf94c SHA-1: 43dc07107536c85e840cef9d79e716a623f7becb SHA-256: 94f876cd370f011f86885f18939937439b642738c45659272fd0a501dcef3d53
122 Risk Score

Malware Insights

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

The PDF document employs a fake CAPTCHA and a 'free generator / game hack' lure to trick users into clicking a link. This link, https://netcdn.xyz/app/431946152/win-free-robux-game-hack, likely leads to a malicious download or exploit. The document's structure and embedded URLs suggest it's part of a phishing campaign aiming to deliver malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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.xyz/app/431946152/win-free-robux-game-hack PDF link annotation
    • http://pustaka-smpn3tpi.com/repository/minecraft-hacked-client-bedrock_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/dailyrobux_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/free-coins_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/how-to-get-800-robux-for-free_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-coins-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/are-robux-generators-safe_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/minecraft-wurst_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/robux-for-kids_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/coin-master-download-hack-ios_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/is-roblox-free-on-ps4_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-coin-master-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/robux-free-com_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/coin-master-hack-app-ios_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/free-gifts-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/coin-master-gold-cards-free_GM406889139.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_003_off0000490c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x490C 27204 bytes
SHA-256: 6a6b469dd0789fb00093d4e1eaee6d9da46e8d245b392d844082fb9cf0cc7491
font_01_sfnt_off000087d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87D8 18332 bytes
SHA-256: abf0b8ed31f5047ebf3c1463738251345f2a3e8ea43e3f17fb5c5b26bb0b5a7e

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