Malicious PDF — malware analysis report

Static analysis result for SHA-256 358bab3e81a4133d…

MALICIOUS

PDF

47.4 KB Created: 2021-05-13 12:36:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: bb2868e4ce056a536f52cd3b7265f9f3 SHA-1: 54768fb12f0b6fdfa50736dd645bceb66f7db42f SHA-256: 358bab3e81a4133d6f369367377fdb2651782c96064be6af91f74e5f96ada788
82 Risk Score

Malware Insights

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

The document presents itself as a guide to hacking Roblox accounts, but contains a fake CAPTCHA lure to trick users into clicking a malicious URL. This URL, 'https://netcdn.xyz/app/431946152/how-to-hack-into-someone's-roblox-account-game-hack', likely leads to the download of a second-stage payload. The presence of multiple suspicious URLs and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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/how-to-hack-into-someone PDF link annotation
    • http://priazovrada.gov.ua/images/is-coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • http://priazovrada.gov.ua/images/websites-for-robux_GM431946152.pdfIn PDF document text
    • http://priazovrada.gov.ua/images/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://priazovrada.gov.ua/images/coin-master-free-spins-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://priazovrada.gov.ua/images/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://priazovrada.gov.ua/images/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://priazovrada.gov.ua/images/free-t-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://priazovrada.gov.ua/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://priazovrada.gov.ua/images/free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://priazovrada.gov.ua/images/coin-master-links-for-today_GM406889139.pdfIn PDF document text
    • http://priazovrada.gov.ua/images/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://priazovrada.gov.ua/images/free-spin-online-tool-coin-master_GM406889139.pdfIn PDF document text
    • http://priazovrada.gov.ua/images/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • http://priazovrada.gov.ua/images/free-robux-place_GM431946152.pdfIn PDF document text
    • http://priazovrada.gov.ua/images/games-in-roblox-that-give-you-robux_GM431946152.pdfIn PDF document text
    • http://priazovrada.gov.ua/images/coin-master-bonus_GM406889139.pdfIn PDF document text
    • http://priazovrada.gov.ua/images/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://priazovrada.gov.ua/images/coin-master-mod-apk-hack_GM406889139.pdfIn PDF document text
    • http://priazovrada.gov.ua/images/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://priazovrada.gov.ua/images/free-spins-coin-master-november-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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049ae.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49AE 30756 bytes
SHA-256: 61e2bc7669f6a6264d82cbcb4da5cb8c539d84ba56d64b10dc3339c47ded633f
font_01_sfnt_off00008b2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B2E 2852 bytes
SHA-256: e9630f3bb738ae3bc329a423cf069c8035d70ce2227e3557c42815f85ad3284f
font_02_sfnt_off000094ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94EF 18912 bytes
SHA-256: bf4ecd0153dd3a330a8d8544a3db10b129edd23679e66a7dba01ca4f284b0ccb

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