Malicious PDF — malware analysis report

Static analysis result for SHA-256 583e2d7d6b4d3161…

MALICIOUS

PDF

46.3 KB Created: 2021-06-03 06:06:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 1fe2981b5606e435b81d8782f410f367 SHA-1: f51ece0434e4b43261de4b3dbb7a11648d62d846 SHA-256: 583e2d7d6b4d3161fa5fa289c8b85bcfb27857cdf9931b0046d342358447a24b
82 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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-roblox-adopt-me-accounts-game-hack PDF link annotation
    • https://library.kysm.edu.my/repository/minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/mcpe-master-free-coins_GM406889139.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/coin-master-hacks_GM406889139.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/coin-master-hack-tool-v1-9-download_GM406889139.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/coin-master-daily-spin-link_GM406889139.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/unlimited-robux-2021_GM431946152.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • https://www.library.kysm.edu.my/repository/minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • https://www.library.kysm.edu.my/repository/free-college-textbooks-tiktok_GM835599320.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/wwwhaktutsin-2021-08-coinmasterfreespinandcoinlinkhtml-m-1_GM406889139.pdfIn PDF document text
    • https://www.library.kysm.edu.my/repository/coin-master-2021-free-spins_GM406889139.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/robux-free-online_GM431946152.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/free-daily-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.library.kysm.edu.my/repository/free-coin-master-app_GM406889139.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/earn-robux-now_GM431946152.pdfIn PDF document text
    • https://www.library.kysm.edu.my/repository/coin-master-hack-generator-tool_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
stream_004_off0000530e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x530E 27504 bytes
SHA-256: 7943057916029bb078d52d3e5a9c9907aad0caaacbb2132ef1bdbb4449d25247
font_01_sfnt_off000090fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90FC 18740 bytes
SHA-256: 52016c63ee0cd8fd8855830f6c2d9c8ac83d5d7faec0726816e5f8d474f3b9d5

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