Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4a85820a295ec6c…

MALICIOUS

PDF

34.6 KB Created: 2021-06-30 09:39:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 95f8dc756e4322eb6bb40c2d88f58a96 SHA-1: c488de969a5e0e857af46469b3d140ba47bb517c SHA-256: d4a85820a295ec6ca1acc477cc59df3703705a9802effbd66bed71699c1c2956
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a lure related to game hacks and free items, specifically mentioning Roblox and Coin Master. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly indicates a deceptive intent. While no scripts were extracted, the embedded URLs are the primary indicators of malicious activity, likely leading to malware downloads or phishing pages.

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.co/app/431946152/free-admin-panel-roblox-pastebin-game-hack PDF link annotation
    • http://camphat.com.vn/upload/UploadFiles/files/coin-master-hack-apk-2021_GM406889139.pdfIn PDF document text
    • http://camphat.com.vn/upload/UploadFiles/files/roblox-hacked-version_GM431946152.pdfIn PDF document text
    • http://camphat.com.vn/upload/UploadFiles/files/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://camphat.com.vn/upload/UploadFiles/files/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://camphat.com.vn/upload/UploadFiles/files/roblox-grinding-cheat_GM431946152.pdfIn PDF document text
    • http://camphat.com.vn/upload/UploadFiles/files/how-to-get-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://camphat.com.vn/upload/UploadFiles/files/roblox-catalog-free_GM431946152.pdfIn PDF document text
    • http://camphat.com.vn/upload/UploadFiles/files/all-links-for-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://camphat.com.vn/upload/UploadFiles/files/how-to-make-a-modded-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://camphat.com.vn/upload/UploadFiles/files/hack-this-site-roblox_GM431946152.pdfIn PDF document text
    • http://camphat.com.vn/upload/UploadFiles/files/how-to-get-free-robux-grayphiny_GM431946152.pdfIn PDF document text
    • http://camphat.com.vn/upload/UploadFiles/files/how-to-download-minecraft-for-free-on-windows-10_GM479516143.pdfIn PDF document text
    • http://camphat.com.vn/upload/UploadFiles/files/coin-master-hack-spins-app_GM406889139.pdfIn PDF document text
    • http://camphat.com.vn/upload/UploadFiles/files/free-roblox-wings_GM431946152.pdfIn PDF document text
    • http://camphat.com.vn/upload/UploadFiles/files/daily-coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://camphat.com.vn/upload/UploadFiles/files/2021-roblox_GM431946152.pdfIn PDF document text
    • http://camphat.com.vn/upload/UploadFiles/files/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://camphat.com.vn/upload/UploadFiles/files/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://camphat.com.vn/upload/UploadFiles/files/coin-master-cards-free-cards_GM406889139.pdfIn PDF document text
    • http://camphat.com.vn/upload/UploadFiles/files/regal-world-coin-master_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_off00002ff4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FF4 22240 bytes
SHA-256: 307b8eb4c340ea3ac128d1a0f1c8a01e41758ed5c4db3c521c10387151fa349c
font_01_sfnt_off00006111.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6111 19460 bytes
SHA-256: 25ea65249292bcfc5e8cc50883815d2f56a9e7cf1eda4fe219df2e0ed0b3b06b

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