Malicious PDF — malware analysis report

Static analysis result for SHA-256 a05e643fa5c0cb5f…

MALICIOUS

PDF

45.3 KB Created: 2021-06-11 05:15:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: eec1b0a1e6a35c078adce2f3c16423e9 SHA-1: 3688843c327c3441a043a1616f63912f87ab96d8 SHA-256: a05e643fa5c0cb5f8b84a41cdcf3599f99b85f59ca062fd1d77aa911110a947f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to 'free Robux' and directs users to a URL that is flagged as a game hack redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to trick users into visiting malicious sites, likely for phishing or malware distribution. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/do-you-want-to-get-free-robux-game-hack PDF link annotation
    • http://www.mostraining.co.za/images/play-free-games-roblox-com_GM431946152.pdfIn PDF document text
    • http://www.mostraining.co.za/images/free-robux-safe_GM431946152.pdfIn PDF document text
    • http://www.mostraining.co.za/images/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://www.mostraining.co.za/images/how-to-get-free-robux-no-games_GM431946152.pdfIn PDF document text
    • http://www.mostraining.co.za/images/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • http://www.mostraining.co.za/images/coin-master-hack-twitter_GM406889139.pdfIn PDF document text
    • http://www.mostraining.co.za/images/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.mostraining.co.za/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.mostraining.co.za/images/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://www.mostraining.co.za/images/free-robux-no-human-verification-and-no-download_GM431946152.pdfIn PDF document text
    • http://www.mostraining.co.za/images/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.mostraining.co.za/images/coin-master-hack-tool-v1-9-download-free_GM406889139.pdfIn PDF document text
    • http://www.mostraining.co.za/images/free-tiktok-likes-without-verification_GM835599320.pdfIn PDF document text
    • http://www.mostraining.co.za/images/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • http://www.mostraining.co.za/images/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • http://www.mostraining.co.za/images/coin-master-links-for-today_GM406889139.pdfIn PDF document text
    • http://www.mostraining.co.za/images/how-to-get-free-cool-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.mostraining.co.za/images/how-to-get-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • http://www.mostraining.co.za/images/free-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://www.mostraining.co.za/images/free-spins-coin-master-2021_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
font_00_sfnt_off0000521e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x521E 25116 bytes
SHA-256: 6defa4de334397af09369f9f51e409227d9ad0c3300efc4fbdbb8ec5fe7f3d2b
font_01_sfnt_off00008c80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C80 18876 bytes
SHA-256: fe6159b773b273a54d97d4bca14d66c22be60f3ee115782db8b958c598f44121

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