Malicious PDF — malware analysis report

Static analysis result for SHA-256 dad12e182240c547…

MALICIOUS

PDF

44.6 KB Created: 2021-05-17 13:48:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: ef97b96ddd7437b394bddecc8e87c8d8 SHA-1: d29927f583095b615cf751ceed254a83ef722f2a SHA-256: dad12e182240c547f32c4d0aad116accfe0b09c0f3f77e1bc0bfdd558f2a7150
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 0.9632

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/how-to-get-more-spins-on-coin-master-hack-game-hack PDF link annotation
    • https://vieclamjapan.com/upload/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/how-to-win-attack-madness-in-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/clean-master-coins-hack_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/toolbox-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/coin-master-spins_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/game-hunters-coin-master_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/code-free-robux_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/coin-master-hack-spins-app_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/free-promo-codes-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/minecraft-reach-hack_GM479516143.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/free-robux-easy-and-fast_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_003_off00004994.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4994 25412 bytes
SHA-256: 66bb3061ffad1acc0e334c76a92bcf0da2b116daede1ba466b19954edb081574
font_01_sfnt_off000082bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82BB 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008c6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C6C 18056 bytes
SHA-256: c25be2ee10aa6c8dac98d181bff9bbb73a764afdf7857c2243de642e2757df86

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