Malicious PDF — malware analysis report

Static analysis result for SHA-256 adbd9ddc080d8f4a…

MALICIOUS

PDF

47.5 KB Created: 2021-06-03 11:11:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: eaff0d9ee2470282ae36bbfa3ad3818a SHA-1: 1d1331bea8c9c0fe6c0ef83b146957f07301fa4e SHA-256: adbd9ddc080d8f4a5663c281bc8696a438cdffe87e1dc03516d425c9d0026163
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 a malicious URL. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to potentially malicious content or downloads. The ML classifier also flagged this PDF as malicious.

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.online/app/431946152/free-robux-pins-game-hack PDF link annotation
    • http://lib.icbc-indonesia.org/repository/pubg-8-uc-buy_GM1330123889.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/claim-roblox_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/download-apps-for-robux_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/coin-master-free-coins-and-spins-online-tool_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/how-many-levels-does-coin-master-have_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/minecraft-menu_GM479516143.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/roblox-password-hacker_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/free-robux-website_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/minecraft-education-free_GM479516143.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/how-to-get-free-spins-on-coin-master-2021-ios_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/moonactive-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/how-to-make-a-minecraft-client_GM479516143.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/coin-master-claim-spins_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/free-robux-co_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/roblox-free-items-glitch_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/free-minecraft-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/how-to-hack-roblox-accounts-for-robux_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_off00005037.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5037 26968 bytes
SHA-256: a1cecab9c212de927113d63645cb94116a8ffacea80b19f3e9a0fb8b7fdaf657
font_01_sfnt_off00008d4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D4F 2824 bytes
SHA-256: 1dfab032992e232d8ef996ecf69dba1c51fe16ea10218612c3df6347b27779f8
font_02_sfnt_off000096fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96FE 18288 bytes
SHA-256: be7609bd7ddc69eb994b080447c8f3e95bc75a4b3676ce3cbb6c2619f3d9524c

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