Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6dc36ab8b552105…

MALICIOUS

PDF

45.8 KB Created: 2021-05-12 10:33:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 2d7338b86a01cebb3bd29c929a55b4de SHA-1: 8ba239f5e281e890652039fd40e59634b118066f SHA-256: d6dc36ab8b55210585c6c595731bb2c14cd3966684acf01afde5ad70a246336b
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a link that redirects to a 'free Robux generator' lure, which is a common social engineering tactic. The presence of a fake CAPTCHA heuristic further supports this, indicating an attempt to trick the user into interacting with the malicious content. While no scripts were directly extracted, the PDF structure itself facilitates the redirection to the malicious URL, likely as part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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-no-human-verification-or-survey-or-download-2021-game-hack PDF link annotation
    • https://www.dachytarasowe.eu/images/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • https://www.dachytarasowe.eu/images/login-robux_GM431946152.pdfIn PDF document text
    • https://www.dachytarasowe.eu/images/www-coin-master-hack-com_GM406889139.pdfIn PDF document text
    • https://www.dachytarasowe.eu/images/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • https://www.dachytarasowe.eu/images/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • https://www.dachytarasowe.eu/images/get-me-free-robux_GM431946152.pdfIn PDF document text
    • https://www.dachytarasowe.eu/images/how-to-use-wurst_GM479516143.pdfIn PDF document text
    • https://www.dachytarasowe.eu/images/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.dachytarasowe.eu/images/hack-game-coin-master_GM406889139.pdfIn PDF document text
    • https://www.dachytarasowe.eu/images/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.dachytarasowe.eu/images/coin-master-coin-hack_GM406889139.pdfIn PDF document text
    • https://www.dachytarasowe.eu/images/hack-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • https://www.dachytarasowe.eu/images/robux-in_GM431946152.pdfIn PDF document text
    • https://www.dachytarasowe.eu/images/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.dachytarasowe.eu/images/earn-rbx_GM431946152.pdfIn PDF document text
    • https://www.dachytarasowe.eu/images/free-robux-site_GM431946152.pdfIn PDF document text
    • https://www.dachytarasowe.eu/images/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.dachytarasowe.eu/images/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • https://www.dachytarasowe.eu/images/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • https://www.dachytarasowe.eu/images/free-realistic-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://wolfzscriptsIn 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_off00004a92.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A92 23944 bytes
SHA-256: 0669f871ee075558b1d11c25d68346009a061b6d541fb3d760a239516aa84444
font_01_sfnt_off000080e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80E9 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off00008a9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A9A 20136 bytes
SHA-256: 66e5e50e12f5eb49621ab9bcd6ab85026409d616512a452c1eb3339dd9867554

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