Malicious PDF — malware analysis report

Static analysis result for SHA-256 f05ad721245a7541…

MALICIOUS

PDF

34.6 KB Created: 2021-07-05 01:21:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 79db56d68367d85cae870aed0204c285 SHA-1: 607dc53f4aae983e05ad619be529cd65873065b8 SHA-256: f05ad721245a754120614c932b0c91e2ae1c40a869fa30f27cac093ecf01b6e2
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a game hack lure to entice users to click on a link. The primary link, http://netcdn.tw/app/406889139/card-hack-in-coin-master-game-hack, redirects to a potentially malicious site. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to a resource that likely hosts further malicious content or exploits. The ML classifier also strongly indicated maliciousness.

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/card-hack-in-coin-master-game-hack PDF link annotation
    • https://daftarmncvision.id/ckfinder/userfiles/files/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • https://daftarmncvision.id/ckfinder/userfiles/files/roblox-email-cheat_GM431946152.pdfIn PDF document text
    • https://daftarmncvision.id/ckfinder/userfiles/files/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • https://daftarmncvision.id/ckfinder/userfiles/files/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • https://daftarmncvision.id/ckfinder/userfiles/files/complete-the-obby-for-free-robux_GM431946152.pdfIn PDF document text
    • https://daftarmncvision.id/ckfinder/userfiles/files/free-robux-promo-code-gen_GM431946152.pdfIn PDF document text
    • https://daftarmncvision.id/ckfinder/userfiles/files/how-to-get-free-minecraft-alts_GM479516143.pdfIn PDF document text
    • https://daftarmncvision.id/ckfinder/userfiles/files/roblox-how-to-make-a-free-t-shirt_GM431946152.pdfIn PDF document text
    • https://daftarmncvision.id/ckfinder/userfiles/files/roblox-mad-city-hack-rank_GM431946152.pdfIn PDF document text
    • https://daftarmncvision.id/ckfinder/userfiles/files/114-hacks_GM479516143.pdfIn PDF document text
    • https://daftarmncvision.id/ckfinder/userfiles/files/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • https://daftarmncvision.id/ckfinder/userfiles/files/hacked-roblox-spray-id_GM431946152.pdfIn PDF document text
    • https://daftarmncvision.id/ckfinder/userfiles/files/minecraft-windows-10-free-with-java_GM479516143.pdfIn PDF document text
    • https://daftarmncvision.id/ckfinder/userfiles/files/www-free-robux-com_GM431946152.pdfIn PDF document text
    • https://daftarmncvision.id/ckfinder/userfiles/files/how-to-hack-any-pokemon-into-project-pokemon-roblox_GM431946152.pdfIn PDF document text
    • https://daftarmncvision.id/ckfinder/userfiles/files/roblox-exploit-free-2021_GM431946152.pdfIn PDF document text
    • https://daftarmncvision.id/ckfinder/userfiles/files/minecraft-free-education_GM479516143.pdfIn PDF document text
    • https://daftarmncvision.id/ckfinder/userfiles/files/how-to-hack-roblox-with-cheat-engine-64-robux_GM431946152.pdfIn PDF document text
    • https://daftarmncvision.id/ckfinder/userfiles/files/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • https://daftarmncvision.id/ckfinder/userfiles/files/minecraft-pc-download-free-full-version_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_002_off000030ec.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30EC 23020 bytes
SHA-256: aa6ff5ba3d18ffad7f8533c39431e7bd80535516aeac0223fb65bf127d91821b
font_01_sfnt_off000064c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64C3 18180 bytes
SHA-256: 610c98fbefd1f098a8e1eea02af770c3786bc8d2862495ec77f525b61ab0d19b

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