Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb7d867b04d46e55…

MALICIOUS

PDF

42.9 KB Created: 2021-05-15 10:41:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 01aa15ac94a9e3e12a7b4c037635b4c2 SHA-1: c5107d7289f5f00f729b2e9486eba82c3fa5ff1b SHA-256: bb7d867b04d46e558a8a29e9c588c9188dc190984af8b46157ae9c61c17ccc44
82 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. The file 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 4

  • 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/uprobux.com-free-robux-game-hack PDF link annotation
    • https://lesegais.ru/images/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://lesegais.ru/images/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://lesegais.ru/images/como-descargar-coin-master-hackeado_GM406889139.pdfIn PDF document text
    • https://lesegais.ru/images/claimrbx-free-robux_GM431946152.pdfIn PDF document text
    • https://lesegais.ru/images/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://lesegais.ru/images/coin-master-apk-mod_GM406889139.pdfIn PDF document text
    • https://lesegais.ru/images/is-minecraft-free-on-xbox_GM479516143.pdfIn PDF document text
    • https://lesegais.ru/images/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • https://lesegais.ru/images/coin-master-daily-free-link_GM406889139.pdfIn PDF document text
    • https://lesegais.ru/images/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • https://lesegais.ru/images/roblox-hack-game_GM431946152.pdfIn PDF document text
    • https://lesegais.ru/images/free-spins-link-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://lesegais.ru/images/minecraft-hacks-115-2_GM479516143.pdfIn PDF document text
    • https://lesegais.ru/images/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • https://lesegais.ru/images/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://lesegais.ru/images/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://lesegais.ru/images/flip-master-free-coins_GM406889139.pdfIn PDF document text
    • https://lesegais.ru/images/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://lesegais.ru/images/how-to-make-roblox-clothes-for-free_GM431946152.pdfIn PDF document text
    • https://lesegais.ru/images/coin-master-100-spin_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_off00004961.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4961 25680 bytes
SHA-256: 71ebc91502bc52f5640ff48a6802bb7fb4ebc9972435278c67b7e693235e1a54
font_01_sfnt_off0000846c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x846C 18700 bytes
SHA-256: 143ab518bfe1873128e001b27a68cdab9711d8d723564be581f3f50f35f3a2b6

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