Malicious PDF — malware analysis report

Static analysis result for SHA-256 481687f5524e4dc8…

MALICIOUS

PDF

46.0 KB Created: 2021-06-03 10:53:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e89888054ac85f7dc170c6ceb9e95e87 SHA-1: d965512ba904f73741adbe3019be32a8c53c5f72 SHA-256: 481687f5524e4dc89a95b539409832d15b68e611fcc8f33f482c161cd235b1f3
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 0.9864

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/406889139/coin-master-hack-co-game-hack PDF link annotation
    • https://lib.btkljogja.or.id/repository/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/chisel-and-bits-mod-pe_GM479516143.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-free-link_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/minecraft-pe-016-0-apk-download-free_GM479516143.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-daily-free-spins-link-haktuts_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/scaffold-minecraft-hack_GM479516143.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-hack-tool-v1-9-download-free_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/roblox-redeem-codes-free_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/instantrobux_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/robux-codes-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/tiktok-likes-free_GM835599320.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/fort-wars-hacks-roblox_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-daily-free-spins-and-coins_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_off00004f2b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F2B 31500 bytes
SHA-256: 9b073c29b7817a9595e4bb96144b10646b7f1b1608b34d80bb96d668459a799b
font_01_sfnt_off000092f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92F6 17716 bytes
SHA-256: c15a8689411d8cca9ab0759ab4c496fe9b4353d676dd738e300719e9588112ed

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