Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4b388e6c7e21802…

MALICIOUS

PDF

47.6 KB Created: 2021-06-10 22:05:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 2c95b6bff570da9b69d2e020d87c21f9 SHA-1: 9c2254a03efe1909e1a51fea440abfbf9f780d5d SHA-256: b4b388e6c7e21802265b65db457f06441e0297bf2d16759e30f590316ba76b53
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to game hacks, specifically for Roblox, directing users to a suspicious URL. The ML classifier strongly flagged this PDF as malicious. The embedded URLs likely lead to a site designed to host further malicious content or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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/how-to-hack-jailbreak-roblox-money-game-hack PDF link annotation
    • https://www.repository.ptiq.ac.id/repository/how-to-hack-at-roblox_GM431946152.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/coin-master-hack-2021-free_GM406889139.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/minecraft-servers-that-allow-hacks_GM479516143.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/real-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/hack-coin-master-apk-33_GM406889139.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/pubg-uc-price-in-uae_GM1330123889.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/roblox-free-robux-games-that-work-2021_GM431946152.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/coin-master-fb-free-spins-link_GM406889139.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/roblox-www-com_GM431946152.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/coin-master-free-spins-android_GM406889139.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/roblox-hack-apk_GM431946152.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/free-spin-coin-master-apk_GM406889139.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/rblx-gg-robux-free_GM431946152.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/how-to-hack-peoples-roblox-accounts_GM431946152.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_004_off0000513a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x513A 25536 bytes
SHA-256: 5df2aeee494826b4a4b3f31200bafb154c09e035b40a870aece748b20ac26805
font_01_sfnt_off00008b6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B6E 2824 bytes
SHA-256: 94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4
font_02_sfnt_off0000951c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x951C 19008 bytes
SHA-256: c96e1d69dadfc1bc77cbccb39abd32015886d81bd5cecec560fc290327f9cd77

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