Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad19defc9a5216c4…

MALICIOUS

PDF

46.8 KB Created: 2021-05-17 07:03:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 95c1afc63a743a96907b28fe1ae72a30 SHA-1: d0876e52d0e05da7bf787a9e098752223196cf8f SHA-256: ad19defc9a5216c406a5017b43c4cee96398d769aaccdace5127839728d8561e
122 Risk Score

Malware Insights

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

The PDF document contains a lure for 'free Robux codes generator' and a fake CAPTCHA prompt, indicating a social engineering attack. It links to a suspicious URL, https://netcdn.xyz/app/431946152/free-robux-codes-generator-no-verification-game-hack, which is likely the next stage of the attack. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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-codes-generator-no-verification-game-hack PDF link annotation
    • http://www.businessgalaxy.lk/files/files/free-coin-master-app_GM406889139.pdfIn PDF document text
    • http://www.businessgalaxy.lk/files/files/roblox-arsenal-hacks-download_GM431946152.pdfIn PDF document text
    • http://www.businessgalaxy.lk/files/files/coin-master-hack-for-ios_GM406889139.pdfIn PDF document text
    • http://www.businessgalaxy.lk/files/files/coin-master-cheat-codes_GM406889139.pdfIn PDF document text
    • http://www.businessgalaxy.lk/files/files/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • http://www.businessgalaxy.lk/files/files/coin-master-hack-tool-v1-9-pc_GM406889139.pdfIn PDF document text
    • http://www.businessgalaxy.lk/files/files/free-roblox-svg_GM431946152.pdfIn PDF document text
    • http://www.businessgalaxy.lk/files/files/free-minecraft-mods_GM479516143.pdfIn PDF document text
    • http://www.businessgalaxy.lk/files/files/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.businessgalaxy.lk/files/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.businessgalaxy.lk/files/files/roblox-fun-robux_GM431946152.pdfIn PDF document text
    • http://www.businessgalaxy.lk/files/files/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.businessgalaxy.lk/files/files/hack-coin-master-apk-358_GM406889139.pdfIn PDF document text
    • http://www.businessgalaxy.lk/files/files/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.businessgalaxy.lk/files/files/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • http://www.businessgalaxy.lk/files/files/minecraft-free-apk-download-016-0_GM479516143.pdfIn PDF document text
    • http://www.businessgalaxy.lk/files/files/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.businessgalaxy.lk/files/files/mistplay-robux_GM431946152.pdfIn PDF document text
    • http://www.businessgalaxy.lk/files/files/minecraft-free-apk_GM479516143.pdfIn PDF document text
    • http://www.businessgalaxy.lk/files/files/free-robux-pins_GM431946152.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_off0000488c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x488C 28456 bytes
SHA-256: 38dc6784a0f84f2570c494768e75cc4fc5b17e7529c5cb6206ac19f55b09a45a
font_01_sfnt_off00008916.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8916 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off000092c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92C6 18776 bytes
SHA-256: a4a7f46a8ec4e4fe0089faa119d4be48f59112184e2c655defb35f5102acccee

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