Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3219426ca53efbb…

MALICIOUS

PDF

48.9 KB Created: 2021-05-19 23:30:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: e620ee67f031f3dcca4ec75411d9a510 SHA-1: a46d1379a546afb6f406a3db5aa27d840cd4fb50 SHA-256: d3219426ca53efbb81a73b1117d46920a80a9edf64bd8bd32eb62b641354d20d
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by an ML classifier. It uses a clipboard-command (paste-and-run) lure. 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 0.8642

Heuristics 5

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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/479516143/minecraft-dungeons-free-download-pc-game-hack PDF link annotation
    • https://www.utalii.ac.ke/images/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • https://www.utalii.ac.ke/images/free-roblox-accounts-generator_GM431946152.pdfIn PDF document text
    • https://www.utalii.ac.ke/images/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • https://www.utalii.ac.ke/images/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://www.utalii.ac.ke/images/rbx-free-robux_GM431946152.pdfIn PDF document text
    • https://www.utalii.ac.ke/images/coin-master-online-hack-2021_GM406889139.pdfIn PDF document text
    • https://www.utalii.ac.ke/images/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • https://www.utalii.ac.ke/images/is-roblox-free-on-ps4_GM431946152.pdfIn PDF document text
    • https://www.utalii.ac.ke/images/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.utalii.ac.ke/images/free-roblox-usernames-and-passwords_GM431946152.pdfIn PDF document text
    • https://www.utalii.ac.ke/images/get-coin-master-cards-free_GM406889139.pdfIn PDF document text
    • https://www.utalii.ac.ke/images/robux-place-rewards_GM431946152.pdfIn PDF document text
    • https://www.utalii.ac.ke/images/how-to-use-scripts-in-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.utalii.ac.ke/images/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.utalii.ac.ke/images/is-minecraft-free-on-pc_GM479516143.pdfIn PDF document text
    • https://www.utalii.ac.ke/images/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://www.utalii.ac.ke/images/tiktok-free-followers-mod-apk_GM835599320.pdfIn PDF document text
    • https://www.utalii.ac.ke/images/coin-master-hack-tool-generator_GM406889139.pdfIn PDF document text
    • https://www.utalii.ac.ke/images/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • https://www.utalii.ac.ke/images/how-to-get-minecraft-bedrock-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D64 24996 bytes
SHA-256: 81a727b7242d8def9814aff427ad5ee8b4e3c0fb937d9201e1d5a3245c022914
font_01_sfnt_off0000862a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x862A 3020 bytes
SHA-256: f1a29adcea636583330be8db4f6466410de551ac48576b9e1aa5c34e2d665a1f
font_02_sfnt_off0000907e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x907E 2816 bytes
SHA-256: 4555740682277f0055d57b15bd0ba953e5b51415ea3d21c93db391eace072d4f
font_03_sfnt_off00009a8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A8E 18872 bytes
SHA-256: 05183faf73e067548e32258fc58809d25a8fef905510eff8eab59b37bb03aee7

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