Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a4ae509ea9c8b6b…

MALICIOUS

PDF

240.6 KB Created: 2021-04-04 22:59:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ae8c214a60d1b374f2129c4e690f6c91 SHA-1: 047c91256da4c7cef4244df4ae6eac80c71eb642 SHA-256: 8a4ae509ea9c8b6b2aa5bcdac0b4135ce28f0749c8f863c368f0960b8b5c92a3
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple heuristics indicating social engineering and malicious intent, including lures for clipboard command execution and ClickFix attacks. The document body, though heavily obfuscated, suggests a theme related to Roblox and free items, a common lure for phishing or malware distribution. The presence of external URIs pointing to potentially malicious content further supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5773

Heuristics 6

  • ClamAV: Pdf.Phishing.Roblox062100-9873116-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Roblox062100-9873116-0
  • 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
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://gaminggenerator.org/app/431946152/roblox-robloxian-highschool-script-free-vip PDF link annotation
    • http://cdescolapios.org/images/free-mega-vip-roblox.pdfIn PDF document text
    • http://infoagronomia.com.ar/images/www-cheatsguru-com-pc-roblox-cheats-codes.pdfIn PDF document text
    • http://www.gongoff.com/images/robloxworld-pw-free-robux-generator.pdfIn PDF document text
    • http://escolaarboc.cat/images/how-to-get-free-robux-on-roblox-ipad-2021.pdfIn PDF document text
    • http://businessfit.com/images/new-free-items-on-roblox-promocode.pdfIn PDF document text
    • https://gaj.rs/images/cheat-codes-in-roblox-jailbreak.pdfIn PDF document text
    • http://bunadsmaria.com/images/robux-for-free-glich.pdfIn PDF document text
    • http://www.mjclautrec.fr/images/robux-hack-generator-no-survery-no-human-verification.pdfIn PDF document text
    • http://ferienwohnung-walker.de/images/fame-simulator-roblox-hack.pdfIn PDF document text
    • https://stroyzakazremont.ru/images/hack-for-roblox-dll.pdfIn PDF document text
    • https://gomsa.nl/images/cheat-roblox-lumber-tycoon-2.pdfIn PDF document text
    • http://loszavera.com/images/get-400-free-robux.pdfIn PDF document text
    • http://gamixpaliwa.pl/images/free-robux-game-cards.pdfIn PDF document text
    • https://www.cnte.org.br/images/roblox-free-download-ps4.pdfIn PDF document text
    • http://adenmarks.se/images/how-to-use-cheat-engine-on-roblox-one-punch-man.pdfIn PDF document text
    • http://posterprintshop.nl/images/free-roblox-hacks-no-download.pdfIn PDF document text
    • https://www.stayon.no/images/how-to-hack-in-other-roblox-accounts.pdfIn PDF document text
    • http://businessfit.com/images/roblox-how-to-get-free-clothes-2021.pdfIn PDF document text
    • http://firstaidacademy.be/images/hacks-for-vehicle-simulator-on-roblox.pdfIn PDF document text
    • https://zabota-kashira.ru/images/oprewards-com-free-robux.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_off00036ab4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36AB4 22056 bytes
SHA-256: 87c71a058aa0165c2ac8616a0a62434889cde4d57d42b5411c84a0096b6514e8
font_01_sfnt_off00039aa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x39AA9 18892 bytes
SHA-256: 828b79f484b9371fd4b404c49e52396b3b4297f679799b11a0029722bf2d1b7f

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