Malicious PDF — malware analysis report

Static analysis result for SHA-256 f333c7c50e7a4812…

MALICIOUS

PDF

51.5 KB Created: 2021-05-15 15:01:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 5862d8ea69d00140f4e35e9ac10d7b7d SHA-1: 54cce2d714154ab22a3bdda1951119c51d62a760 SHA-256: f333c7c50e7a4812c0b3c3a145c45e1cd8f404561cc5459e2a3adb4929de6066
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links and lures related to game hacks and in-game currency, specifically mentioning 'Robux Gainer'. The primary URL, https://netcdn.xyz/app/431946152/robux-gainer-game-hack, is flagged as a high-risk redirector. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest a malicious workflow designed to trick users into visiting potentially harmful external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9348

Heuristics 4

  • 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.
  • 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/robux-gainer-game-hack PDF link annotation
    • http://sudamericarural.org/images/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://sudamericarural.org/images/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/get-free-roblox_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/coin-master-attack-madness-hack_GM406889139.pdfIn PDF document text
    • http://sudamericarural.org/images/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/roblox-devil_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/minecraft-free-download-windows_GM479516143.pdfIn PDF document text
    • http://sudamericarural.org/images/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://sudamericarural.org/images/minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://sudamericarural.org/images/coin-hackhub-coin-master_GM406889139.pdfIn PDF document text
    • http://sudamericarural.org/images/earn-roblox_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/coin-master-apk-free-download_GM406889139.pdfIn PDF document text
    • http://sudamericarural.org/images/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/free-cracked-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://sudamericarural.org/images/how-to-get-free-coins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://sudamericarural.org/images/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • http://sudamericarural.org/images/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://sudamericarural.org/images/minecraft-java-edition-free-code_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a01.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A01 29032 bytes
SHA-256: 4006184e9c9be0acf3a46db8e8dc0fd28194ec531da4739078d8ce4f60ecd6f6
font_01_sfnt_off00008db8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DB8 8040 bytes
SHA-256: ec02cb0e9f3cb66686737391c782829cc6433b387dd5885ea11263eaff23ba5c
font_02_sfnt_off0000a7a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7A9 18200 bytes
SHA-256: b49f4983386c5e2433966410528fc3ba3932a5551bf841ef6afc48143acf477f

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