Malicious PDF — malware analysis report

Static analysis result for SHA-256 d798a7cda552503c…

MALICIOUS

PDF

35.1 KB Created: 2021-07-03 21:51:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: d3f59fb862239522a5f6afaba0939e9a SHA-1: 3c70a1b08cbe3878c99df38f3fd366de8f10f497 SHA-256: d798a7cda552503c310d570745f73023788a4302b5e6f14735eacf1a969cd901
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a high-severity heuristic indicating it links to a game hack redirector. The embedded URL 'http://netcdn.tw/app/406889139/coin-master-village-3-game-hack' is the primary IOC. While no scripts were explicitly extracted, the PDF structure and heuristics suggest a social engineering lure to drive users to a malicious site, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/coin-master-village-3-game-hack PDF link annotation
    • https://marstechmedical.com/uploaded_files/userfiles/files/websites-where-you-can-get-free-robux_GM431946152.pdfIn PDF document text
    • https://marstechmedical.com/uploaded_files/userfiles/files/a-game-that-someone-cant-hack-in-roblox_GM431946152.pdfIn PDF document text
    • https://marstechmedical.com/uploaded_files/userfiles/files/free-minecraft-bedrock-server-hosting_GM479516143.pdfIn PDF document text
    • https://marstechmedical.com/uploaded_files/userfiles/files/earn-roblox_GM431946152.pdfIn PDF document text
    • https://marstechmedical.com/uploaded_files/userfiles/files/coin-master-game-hacks_GM406889139.pdfIn PDF document text
    • https://marstechmedical.com/uploaded_files/userfiles/files/free-robux-please_GM431946152.pdfIn PDF document text
    • https://marstechmedical.com/uploaded_files/userfiles/files/get-tiktok-followers-free_GM835599320.pdfIn PDF document text
    • https://marstechmedical.com/uploaded_files/userfiles/files/eazy-was-how-to-hack-into-a-roblox-account_GM431946152.pdfIn PDF document text
    • https://marstechmedical.com/uploaded_files/userfiles/files/free-spins-coin-master-october-17-2021_GM406889139.pdfIn PDF document text
    • https://marstechmedical.com/uploaded_files/userfiles/files/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://marstechmedical.com/uploaded_files/userfiles/files/roblox-one-piece-unleashed-hack_GM431946152.pdfIn PDF document text
    • https://marstechmedical.com/uploaded_files/userfiles/files/cheat-engine-roblox-mac_GM431946152.pdfIn PDF document text
    • https://marstechmedical.com/uploaded_files/userfiles/files/free-pair-of-glasses-roblox_GM431946152.pdfIn PDF document text
    • https://marstechmedical.com/uploaded_files/userfiles/files/black-t-shirt-free-roblox_GM431946152.pdfIn PDF document text
    • https://marstechmedical.com/uploaded_files/userfiles/files/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • https://marstechmedical.com/uploaded_files/userfiles/files/free-robux-no-paying_GM431946152.pdfIn PDF document text
    • https://marstechmedical.com/uploaded_files/userfiles/files/free-minecraft-survival-server_GM479516143.pdfIn PDF document text
    • https://marstechmedical.com/uploaded_files/userfiles/files/medikit-free-robux_GM431946152.pdfIn PDF document text
    • https://marstechmedical.com/uploaded_files/userfiles/files/free-robux-gg-promo-codes-2021_GM431946152.pdfIn PDF document text
    • https://marstechmedical.com/uploaded_files/userfiles/files/how-to-not-get-your-roblox-account-hacked_GM431946152.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_off00003310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3310 22868 bytes
SHA-256: f9c4d25166f1aa6f3f5807dc5c73a53ae7f50dfd32007bbee485bcd45eb3893e
font_01_sfnt_off00006668.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6668 18216 bytes
SHA-256: 013099061882cabe4a5b28fedff039c183f142ba80ad6529ed5e41c5d5229a73

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