Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a2a914274ecbb89…

MALICIOUS

PDF

44.4 KB Created: 2021-06-03 09:37:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ee30dafdf7befd2f9f1c8c72ceb4dac9 SHA-1: 2356d5f9849df00e0f8a774d74ea39d020c62eb9 SHA-256: 4a2a914274ecbb89c63fe69be092e1b515f0814b03fe2fe894c0bf7c5bfc2b33
122 Risk Score

Malware Insights

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

The PDF document employs a fake CAPTCHA lure to trick users into clicking a link, which is a common social engineering tactic. The linked URL leads to a page promising free in-game currency, further reinforcing the phishing pretext. While no scripts were directly extracted, the PDF structure and heuristics suggest it's designed to exploit user interaction, likely leading to a malicious download or redirect.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/406889139/get-free-coins-for-coin-master-game-hack PDF link annotation
    • http://xenonsvjetla.com/files/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/robux-sign_GM431946152.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/free-roblox-characters_GM431946152.pdfIn PDF document text
    • http://xenonsvjetla.com/files/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • http://xenonsvjetla.com/files/free-robux-no-password_GM431946152.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/easy-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/coin-master-2021-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://xenonsvjetla.com/files/coin-master-hack-2021-app_GM406889139.pdfIn PDF document text
    • http://xenonsvjetla.com/files/pokemon-go-free-remote-raid-pass-february-2021_GM1094591345.pdfIn PDF document text
    • http://xenonsvjetla.com/files/free-minecraft-generator_GM479516143.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/real-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://xenonsvjetla.com/files/minecraft-build-hacks_GM479516143.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/robux-codes-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://xenonsvjetla.com/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://xenonsvjetla.com/files/how-to-get-20210-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/free-spins-coin-master-without-completing-offers_GM406889139.pdfIn PDF document text
    • http://xenonsvjetla.com/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • http://xenonsvjetla.com/files/daily-coin-master-free-spin-apk_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f77.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F77 26576 bytes
SHA-256: 449b2abe8d042981fa891cb0d4b9073ff45d4d7a8b69543c1243d08424646547
font_01_sfnt_off00008cb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CB3 17712 bytes
SHA-256: 80118a78f95baa80ee89349241cf1d538d1c5fbd1ee094de5b41e3586bb22105

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