Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ec6509c98a7d9f1…

MALICIOUS

PDF

41.7 KB Created: 2021-06-13 22:12:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 06a7517e65795abd9b7701cbcf3cf46c SHA-1: 565f6467d372693e8ea7b8f15b2af0d27543925b SHA-256: 8ec6509c98a7d9f1359de416ba3d6f007a9bb37e4a86cc5d6799eba7b7f9711f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.003 Windows Command Shell

The PDF contains an embedded URL pointing to a resource that likely serves a malicious payload, disguised as a free game item download. The document also contains a heuristic firing for a clipboard command lure, instructing the user to paste content into a shell, indicating an attempt to execute arbitrary commands. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 http://netcdn.co/app/431946152/t-shirt-adidas-roblox-free-game-hack PDF link annotation
    • http://io24.com.ar/images/4-step-way-to-get-free-robux-2021-november_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/how-to-get-free-dominus-and-robux_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/free-robux-today_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/roblox-hack-como-tener-robux-gratis_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/play-games-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/how-to-win-robux_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/coin-master-hack-apk-download-2021_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/free-25-dollar-roblox-card_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/how-many-villages-are-in-coin-master_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/roblox-skins-boy-free_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/hack-robux-roblox-2021-funciona_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/coin-master-32-mod-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/obc-hack-roblox_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/robux-money-cheat_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/grabpoints-robux_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/free-hockey-mask-roblox_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/coin-master-free-spins-link-2021-today_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_off00004741.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4741 24628 bytes
SHA-256: 57372151d026a1660cc0c78d0903684db557fe5713d2a5611fea6c75380c830c
font_01_sfnt_off00007f50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F50 18740 bytes
SHA-256: 3888a3db2d9accb0df7994127bef86d5b0828aa84140cea2e27d2162e24e4c70

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