Malicious PDF — malware analysis report

Static analysis result for SHA-256 96c0cd621390b7db…

MALICIOUS

PDF

44.2 KB Created: 2021-05-14 08:31:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 415f831e696e994e4f2b15a0323494dc SHA-1: 27252e8f3b4e9049a69515f7c863019def1c3383 SHA-256: 96c0cd621390b7db4b09838fe512d0f7bd1e0173b9f0657b504b54ae49ffd144
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains embedded URLs and text that lures users with promises of 'unlimited Robux'. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs suggests an attempt to redirect the user to a site that likely hosts a malicious payload or phishing content. The document also contains a lure to execute commands via the clipboard, indicating a potential for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 4

  • 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/431946152/how-to-get-unlimited-robux-2021-game-hack PDF link annotation
    • https://reggieslockandkey.com/images/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/coin-master-map_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/roblox-old-avatar_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/wwwhaktutsin-2021-08-coinmasterfreespinandcoinlinkhtml-m-1_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/links-to-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/aternos-free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://reggieslockandkey.com/images/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/coin-master-hack-download-apk_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/free-robux-picture_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • http://reggieslockandkey.com/images/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/coin-master-apk-hack-2021-ios_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/coin-master-villages_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/coin-master-hack-2021_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_003_off000047b2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47B2 28144 bytes
SHA-256: afea696aa79a03b03c05c247fae54c17eb367743a27684e75f6b8ff2bbefb4e9
font_01_sfnt_off00008722.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8722 19336 bytes
SHA-256: 1d788979998456612fc8aa94ab3a8f98716d71a7de86621e0b208fb5420da083

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