Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0724eb055f82b36…

MALICIOUS

PDF

33.7 KB Created: 2021-07-05 13:12:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: ee6616683588cb89b2975b45d96da655 SHA-1: 0f6e149b0dfe02ff6f2b59b278e1e4b88300d12b SHA-256: b0724eb055f82b362e66ad1950eb05bf1438bbe86b35798ead84d8ef2bfbe6cd
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'free Robux' and game hacks, directing users to the URL http://netcdn.tw/app/431946152/free-robux-rewards-game-hack. This URL is flagged as malicious and is likely part of a phishing or scam campaign. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the embedded URL and lure suggest a social engineering attack.

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/431946152/free-robux-rewards-game-hack PDF link annotation
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/promo-code-free-robux_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-svg-free_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/hack-coin-master-spin-apk_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/big-games-free-pet-roblox_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-not-for-sale-roblox-templates_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/is-windows-10-minecraft-free_GM479516143.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/minecraft-windows-10-edition-free_GM479516143.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/apk-roblox-free-robux_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/redeem-roblox-item-free-codes-2021_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-robux-card-codes-2021_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/real-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-adopt-me-hack_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/hack-coin-master-no-survey_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-get-free-robux-by-playing-meep-city_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-username-change-free_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/ssunset-city-how-to-get-free-money-roblox_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_off00002d0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D0B 22320 bytes
SHA-256: 909f71c64091cf23fb652481d05a094365d652b0714ae1f7972c4d4a34b9193d
font_01_sfnt_off00005e78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E78 19056 bytes
SHA-256: 5fd868e4ea22638534696fb0cd66a74addf388445670d9d0517416fd5b37f315

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