Malicious PDF — malware analysis report

Static analysis result for SHA-256 66435cd16e8393fb…

MALICIOUS

PDF

33.5 KB Created: 2021-07-30 09:07:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: cec7bdbc4493e467935a97178005e3d7 SHA-1: c114c38999fc28a5bf4969c1945a92b1957c99ed SHA-256: 66435cd16e8393fb8216238f8999a5088549d46ff7bbdedc074b1b3bb5951cc8
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 0.9942

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/479516143/how-to-create-a-minecraft-server-for-free-game-hack PDF link annotation
    • https://kierowcyhgv.uk/images/free-robux-link_GM431946152.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/tiktok-free-fans_GM835599320.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/minecraft-free-download-mac_GM479516143.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/how-to-get-minecraft-for-free-on-mobile_GM479516143.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/free-minecraft-alt-accounts_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
font_00_sfnt_off00002ee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EE4 22924 bytes
SHA-256: e60265a9890d59ba4d7e380bc85ce67e3d91da84fb17474a48146b63dc62eac9
font_01_sfnt_off000061f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61F9 17988 bytes
SHA-256: 060fb71443e6007603a371ac142d4c0d51e0ba8cefae348522c79638c30c3a2b

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