Malicious PDF — malware analysis report

Static analysis result for SHA-256 22520bc4be4bb8d8…

MALICIOUS

PDF

42.6 KB Created: 2021-05-15 09:39:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 2cb56e466014f0e00f3b62c76c0d269a SHA-1: 035237247e1804507f534f9ad251db31c8fbcd59 SHA-256: 22520bc4be4bb8d81331030ec2133d1d081ee65204e8256496ca109b25f6dd3a
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 0.9971

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/free-robux-without-offers-game-hack PDF link annotation
    • http://www.hotel-seminaire.com/images/i-want-free-robux_GM431946152.pdfIn PDF document text
    • http://www.hotel-seminaire.com/images/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • http://www.hotel-seminaire.com/images/descargar-coin-master-hackeado_GM406889139.pdfIn PDF document text
    • http://www.hotel-seminaire.com/images/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • http://www.hotel-seminaire.com/images/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://www.hotel-seminaire.com/images/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://www.hotel-seminaire.com/images/coin-master-free-coins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://www.hotel-seminaire.com/images/minecraft-xbox-360-free-download-code_GM479516143.pdfIn PDF document text
    • http://www.hotel-seminaire.com/images/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://www.hotel-seminaire.com/images/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • http://www.hotel-seminaire.com/images/doctor-louie-roblox_GM431946152.pdfIn PDF document text
    • http://www.hotel-seminaire.com/images/spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.hotel-seminaire.com/images/optifine-mcpe_GM479516143.pdfIn PDF document text
    • http://www.hotel-seminaire.com/images/how-to-download-minecraft-for-free-on-windows_GM479516143.pdfIn PDF document text
    • http://www.hotel-seminaire.com/images/free-coins-and-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.hotel-seminaire.com/images/minecraft-pe-hack-client-ios_GM479516143.pdfIn PDF document text
    • http://www.hotel-seminaire.com/images/coin-master-100-free-spins-link_GM406889139.pdfIn PDF document text
    • http://www.hotel-seminaire.com/images/coin-master-collect-today-free-spin_GM406889139.pdfIn PDF document text
    • http://www.hotel-seminaire.com/images/free-roblox-hair-girl_GM431946152.pdfIn PDF document text
    • http://www.hotel-seminaire.com/images/coin-master-hack-without-human-verification-2021_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_off00004a11.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A11 25524 bytes
SHA-256: 304ee5eafe3c1d5bd847a6383f46f4b018d462f29530803ec146c23da0bdfe2d
font_01_sfnt_off00008320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8320 18600 bytes
SHA-256: aefc65dd28f007a3f9b16d2e7d3f040b6593358131967176ac90892bab7f0013

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