Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6d8ac8ccc486a05…

MALICIOUS

PDF

47.8 KB Created: 2021-06-04 01:57:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 87ebaf4d40b390a80b5de02f2e811ea1 SHA-1: 03957fe6a394d94e6d8a93f5c98f95f867112949 SHA-256: c6d8ac8ccc486a058e18260af8313bbbd49afe78ab6825deb17d3213ecf2ee4f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains multiple embedded URLs and a high-severity heuristic firing for a 'GAME_HACK_REDIRECT_LURE', indicating it directs users to external sites promising free game hacks. The primary malicious URL identified is https://netcdn.online/app/431946152/robux-matchcomfree-robux-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a social engineering tactic to redirect users to potentially malicious websites, likely for phishing or malware distribution.

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/robux-matchcomfree-robux-game-hack PDF link annotation
    • http://opac.stieimalang.ac.id/repository/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/rbx-earn_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/real-robux-codes_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/free-spin-link-for-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/free-coins_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/coin-master-free-spins-generator_GM406889139.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/coin-master-freebies_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/roblox-gang-rape_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/roblox-money-hack_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/coin-master-hack-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/javascript-free-robux_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/free-coin-master-spins-without-human-verification_GM406889139.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/tower-of-hell-roblox-hack_GM431946152.pdfIn PDF document text
    • https://robuxhaxs.comIn PDF document text
    • https://www.roblox.comIn 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_off00005102.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5102 26564 bytes
SHA-256: b64f9e74e2fe1d30bc09fec0b3164b7ff4791cd90af823dc59ab7a980c022428
font_01_sfnt_off00008c68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C68 2912 bytes
SHA-256: fa76cc2dab30b56d5305de71ce949b6adffd6580af2f26905a33966a3200adbb
font_02_sfnt_off00009664.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9664 18804 bytes
SHA-256: cd3abbea537dd1dc3ad65eab9506a5ed256b1ee351d0186eb218be71a2b6aa0d

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