Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3f04ae074c8494d…

MALICIOUS

PDF

34.9 KB Created: 2021-07-05 23:13:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 52e193e1bae54818e161fa1b211a3c9c SHA-1: 17dbff224d2874bc1d98f3d2264f49949d19cad2 SHA-256: b3f04ae074c8494d951d43003064bd225d02b9a2f221c872bbf77770a0a00882
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 0.9980

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 http://netcdn.tw/app/406889139/coin-master-free-spin-and-coin-link-today-game-hack PDF link annotation
    • http://elibraryfk.unjani.ac.id/fkrepository/repository/i-want-robux-for-free-now_GM431946152.pdfIn PDF document text
    • http://elibraryfk.unjani.ac.id/elibrary/repository/free-draw-2-roblox_GM431946152.pdfIn PDF document text
    • http://elibraryfk.unjani.ac.id/elibrary/repository/how-to-get-a-free-bugatti-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://elibraryfk.unjani.ac.id/elibrary/repository/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • http://elibraryfk.unjani.ac.id/fkrepository/repository/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://elibraryfk.unjani.ac.id/elibrary/repository/como-tener-hacks-de-armas-en-roblox_GM431946152.pdfIn PDF document text
    • http://elibraryfk.unjani.ac.id/fkrepository/repository/daily-spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://elibraryfk.unjani.ac.id/fkrepository/repository/minecraft-free-no-download_GM479516143.pdfIn PDF document text
    • http://elibraryfk.unjani.ac.id/elibrary/repository/free-robux-app-real_GM431946152.pdfIn PDF document text
    • http://elibraryfk.unjani.ac.id/elibrary/repository/free-hacks-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elibraryfk.unjani.ac.id/elibrary/repository/happymod-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elibraryfk.unjani.ac.id/fkrepository/repository/apocalypse-rising-roblox-map-free-download_GM431946152.pdfIn PDF document text
    • http://elibraryfk.unjani.ac.id/fkrepository/repository/roblox-inappropriate-games_GM431946152.pdfIn PDF document text
    • http://elibraryfk.unjani.ac.id/elibrary/repository/nice-clothes-that-are-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://elibraryfk.unjani.ac.id/elibrary/repository/coin-master-code-hack_GM406889139.pdfIn PDF document text
    • http://elibraryfk.unjani.ac.id/elibrary/repository/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • http://elibraryfk.unjani.ac.id/elibrary/repository/how-to-hack-a-roblox-account-using-command-prompt_GM431946152.pdfIn PDF document text
    • http://elibraryfk.unjani.ac.id/elibrary/repository/robux-free-pastebin-2021_GM431946152.pdfIn PDF document text
    • http://elibraryfk.unjani.ac.id/fkrepository/repository/xray-mod-minecraft-114_GM479516143.pdfIn PDF document text
    • http://elibraryfk.unjani.ac.id/fkrepository/repository/coin-master-free-redeem-code_GM406889139.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_off0000305a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x305A 23076 bytes
SHA-256: 7425cedf9c42bb6e8090b2f3ee03a3df858675a220ad5e8b4fb378a38038fdd3
font_01_sfnt_off0000646f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x646F 18696 bytes
SHA-256: a6f9ee4f31e630697269259bd77ba9f20f050f36d84dfdb118abf4b75a264952

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