Malicious PDF — malware analysis report

Static analysis result for SHA-256 1af425e180270dbd…

MALICIOUS

PDF

43.5 KB Created: 2021-06-10 21:27:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 2d50b61ffc9247fd647fe1dfaad99a9a SHA-1: b2a543d29633dfde31b10e1b8be7784cf5005307 SHA-256: 1af425e180270dbdb3eaec24adcdbf1c071c98857a63a3d2224de6205bc85d49
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA to trick users into interacting with it, likely to initiate a download or exploit. The embedded URL points to a resource that claims to be a 'Roblox Hack Robux 2021', suggesting a lure for game-related cheats or exploits. While no scripts were explicitly extracted, the PDF structure and heuristics indicate malicious intent, possibly involving JavaScript execution for payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.tw/app/431946152/roblox-hack-robux-2021-no-download-game-hack PDF link annotation
    • http://lib.fisipumt.ac.id//repository/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-free-spin-2912-2021_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-free-spins-that-really_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/murder-island-hack-roblox-script_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-free-spins-link-2021-download_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-hack-tool-2021_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/minecraft-free-install_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-email-rewards_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/piano-keyboard-free-use-music-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/game-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-anime-fighting-simulator-free-vip-server_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-minecraft-addons_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/how-to-get-java-minecraft-free_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-claim-spins_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-spins-coin-master-unlimited_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_004_off00004e49.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E49 23772 bytes
SHA-256: 619566b1da59484643a127cd6a75a57abcdeae9dc15e011d44b925125ec84432
font_01_sfnt_off00008436.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8436 19228 bytes
SHA-256: f1d4aaaec92b8d63017f704dc857321d2b032723f15590496d2f230c79f81d0d

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