Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec9e6d8b83cfbdc8…

MALICIOUS

PDF

33.5 KB Created: 2021-07-05 13:31:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 0fde3d2489338cab2846f7dca38bf350 SHA-1: 6002eefcf42df3ff6d471e63cdf50e73c0f475ab SHA-256: ec9e6d8b83cfbdc890bb6913b88b8adbfe0cbd5c8f57fdd3ffff4672bc89d4fd
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 0.9980

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 http://netcdn.tw/app/406889139/100-hack-coin-master-game-hack PDF link annotation
    • https://perpus.upp.ac.id/digilib/repository/roblox-robux-hack-computer_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/minecraft-windows-10-key-free_GM479516143.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/roblox-earn_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-unlimited-coin-master-400-spin-link_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-official-website_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-free-spins-and-coins-generator_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/download-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/wurst-mc_GM479516143.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-robux-earn_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/how-to-get-free-money-in-mad-city-roblox_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/roblox-sand-simulator-hack-for-android-2021_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-free-spins-link-2021-iphone_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-hack-mod-apk-download_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/mcpe-master-coins-hack_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/how-to-get-free-robux-very-easy_GM431946152.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_002_off00002e67.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E67 22356 bytes
SHA-256: 9d845b4ddb8f3ac341e65079e3ba591ef6d8285bded6774e80e84e042605f018
font_01_sfnt_off0000601a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x601A 18280 bytes
SHA-256: f6797d4b75acbc4c9628d8c5a5329642bbd0e0b45dea8898f5d31ce971109785

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