Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad7732655d145857…

MALICIOUS

PDF

46.1 KB Created: 2021-05-23 15:35:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: cea152936d5f0fc47d4133e3023fb346 SHA-1: 6a0ae103592595e33353874e946a43c73ecf4652 SHA-256: ad7732655d14585756f84ba3e56ce47ef0485c7c0b2ab78e78784dc6dd72b40e
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 0.7777

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/479516143/best-minecraft-hacked-client-game-hack PDF link annotation
    • http://fred.com.ua/images/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://fred.com.ua/images/free-fire-tik-tok_GM835599320.pdfIn PDF document text
    • http://fred.com.ua/images/how-to-hack-golden-card-in-coin-master_GM406889139.pdfIn PDF document text
    • http://fred.com.ua/images/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://fred.com.ua/images/minecraft-wurst-hacked-client_GM479516143.pdfIn PDF document text
    • https://discord.ggIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003442.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3442 24500 bytes
SHA-256: 592bcc85c599f7a10c126ca16c17103d18edf908c4f450edd172a49e9f96439f
font_01_sfnt_off00006b57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B57 7936 bytes
SHA-256: 218d53b68bdddb064f6fba4be822d5b3725ed1cef1a3b42796a8dd99c4a62f4e
font_02_sfnt_off00008480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8480 4232 bytes
SHA-256: ab6320ab342704d2c5943abfba82ed4837bf2da871c91621741fd4cfd15c6ed5
font_03_sfnt_off0000930c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x930C 18200 bytes
SHA-256: 05f9c4237b996275e109c4becad50b5cb7d88affc4d3e55964976ee2f9eee8f2

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