Malicious PDF — malware analysis report

Static analysis result for SHA-256 d41d722083df95cf…

MALICIOUS

PDF

41.1 KB Created: 2021-05-11 13:44:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 405d08b626ba16074ff7d8289725b774 SHA-1: 84bc4c18f687d0f22f79442e0d6b6460d3a7dc7c SHA-256: d41d722083df95cf188c69389852ab005bd29adfb07b24be87135f609f76bbf1
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 0.9971

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.xyz/app/406889139/free-foxy-food-coin-master-game-hack PDF link annotation
    • http://library.ulb.ac.id/repository/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/hack-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/give-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-free-spin-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/roblox-adopt-me-hack_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-card-collection-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-links-for-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-images_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/roblox-tracker_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/roblox-verification_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/haktuts-coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/universal-minecraft-converter-free_GM479516143.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_003_off00004632.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4632 25216 bytes
SHA-256: 3ec336b6d1fc5da44c87cd183d92a9c4d985b1e6f8a055836b22313a5397edbf
font_01_sfnt_off00007dfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DFE 18272 bytes
SHA-256: 36b3b1238517c33c5efb2f434edc6a86fb2c27e62e92d06e943c1c1826ebc1e6

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