Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdf368d1178aa224…

MALICIOUS

PDF

35.3 KB Created: 2021-07-05 17:42:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: af5ae2cb9c2194242a19f324ef307524 SHA-1: ff86ac367e2fda8bcc4c070203c22a54ba161666 SHA-256: cdf368d1178aa224037296d8158cf1098ea94f670424a81104cc40a69409c50b
102 Risk Score

Malware Insights

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

This PDF document contains numerous links to external websites, many of which are SEO-optimized PDFs related to game hacks and free virtual currency. The ML classifier strongly flagged this PDF as malicious, and the presence of a download button lure further supports a malicious intent. The document likely serves as a lure to direct users to download malicious content or visit phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/431946152/robux-free-gift-card-game-hack
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/free-robux-no-verification-2021-ios_GM431946152.pdf
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/how-to-earn-free-roblox_GM431946152.pdf
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/coin-master-heaven-free-spins-link-2021_GM406889139.pdf
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/how-to-create-vip-server-roblox-for-free_GM431946152.pdf
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/coin-master-hacker-club_GM406889139.pdf
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/how-do-i-get-free-robux-on-roblox-2021_GM431946152.pdf
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/roblox-hack-ga_GM431946152.pdf
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/how-to-get-verified-on-tiktok-for-free-2021_GM835599320.pdf
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/appsmob-info-coin-master-hack_GM406889139.pdf
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/how-many-levels-does-coin-master-have_GM406889139.pdf
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/boy-clothes-free-roblox_GM431946152.pdf
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/free-robux-no-verification-2021-android_GM431946152.pdf
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/robux-websites-that-work_GM431946152.pdf
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/roblox-skyscraper-tycoon-hack-script-pastebin_GM431946152.pdf
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/roblox-hack-executor-download_GM431946152.pdf
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/my-roblox-avatar_GM431946152.pdf
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/fly-hack-download-for-jailbreak-roblox_GM431946152.pdf
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/appsmobinfo-coinmasterhack-coin-master-hack_GM406889139.pdf
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/coin-master-cheat-to-get-free-spins_GM406889139.pdf
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/how-to-acually-get-free-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003287.bin
713d3d24abb7cd322a258b16a719bb4348dd7cb5124d269951c9af36e4e84089		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3287 22496 bytes
font_01_sfnt_off000064ca.bin
9469897dff8cab28ffda57ea4fb04243aaf5b849cb1d333b453ecf02c9debdd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64CA 19112 bytes

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