Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbf9ceb8ad2afed6…

MALICIOUS

PDF

48.0 KB Created: 2021-06-03 07:00:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: d174324dbdfb3831d4c3547e2e0b76eb SHA-1: 130e6033f96ef2bf71455fdb388c75a0c5f34aaa SHA-256: cbf9ceb8ad2afed6a9ac7cf00965b6c865522d71ac33dfc5570a16688767df9c
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 0.9796

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/431946152/how-to-earn-robux-fast-game-hack PDF link annotation
    • http://wwic.wales/uploads/files/files/hack-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/free-spin-link-of-coin-master_GM406889139.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/free-minecraft-pe-server_GM479516143.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/where-to-get-robux_GM431946152.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/free-tiktok-likes-app_GM835599320.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/free-500-tiktok-likes_GM835599320.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/free-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/free-coin-master-spins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/minecraft-app-store-free_GM479516143.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/coin-master-hack-no-verification-ios_GM406889139.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/free-coin-master-cards-link_GM406889139.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/coin-master-100-spin-slot_GM406889139.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/free-disney-plus-accounts-tiktok_GM835599320.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/pubg-uc-pakistan_GM1330123889.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/free-robux-only-username_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_004_off00005270.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5270 25092 bytes
SHA-256: 5b94c134efb3522a64638ebc264af2e197f969bca50d62ad2661182e98eca328
font_01_sfnt_off00008cca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CCA 3400 bytes
SHA-256: 4b3e0f36ad1e0c7e3ea5c178fd2b4f097d1e01575fc6a4101a8b520db34dfe07
font_02_sfnt_off000097f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97F4 18512 bytes
SHA-256: 3b39e5dfa20c565428b23675f3ccd7e93e2dea39b53dc9d5a0b1254e996b49c7