Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e90db780c1ac696…

MALICIOUS

PDF

45.3 KB Created: 2021-05-10 21:12:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8b054b964003f10ffeee4bf9cd2a5a29 SHA-1: eda7a14f926f63a72a5436e3b6b5ecf554a631d6 SHA-256: 0e90db780c1ac696da59ef9da843946e17bf2f3455108c74fef31296787825dc
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 0.9507

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/daily-coin-master-free-spins-game-hack PDF link annotation
    • https://perpustakaan.stieppi.ac.id/repository/minecraft-xbox-360-free-download-code_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/free-coins-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/coin-master-collect-today-free-spin_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/minecraft-pocket-edition-download-free-pe-calculator_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/coin-master-fan_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/free-robux-script_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/try-minecraft-free_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/how-to-hack-coin-master-using-es-file_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/minecraft-pe-mod-menu_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/free-robux-website_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/coin-master-com_GM406889139.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_off00004906.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4906 25400 bytes
SHA-256: 5d7b7f0e0b558ec6a42e80fe4751e8287ff1f5ea05c69342a17e616b7d0af118
font_01_sfnt_off0000837a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x837A 3400 bytes
SHA-256: 4b3e0f36ad1e0c7e3ea5c178fd2b4f097d1e01575fc6a4101a8b520db34dfe07
font_02_sfnt_off00008ea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EA4 18308 bytes
SHA-256: 2e377c4e9f27697957871a52337602293a8911c67983c74714bc140e9d069187

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