Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bbc496e7162b481…

MALICIOUS

PDF

48.5 KB Created: 2021-06-02 15:21:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 3d83f1a710dfa854a2c157135926fbb3 SHA-1: fbcabfb53324aff332e0ab929eaf323209db7932 SHA-256: 1bbc496e7162b4812f4ed284485c1ab28653bc6af117ffa655976e616adffe21
122 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many of which are SEO-optimized and point to pages offering game hacks and free in-game currency. The presence of a mass external PDF link farm and ML classification strongly indicate malicious intent. The document likely serves as a lure to direct users to potentially malicious websites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9895

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/discord-free-roblox-hacks-game-hack
    • http://www.copoint.co.uk/images/how-to-hack-any-roblox-account_GM431946152.pdf
    • http://www.copoint.co.uk/images/free-roblox-accounts-with-robux_GM431946152.pdf
    • http://www.copoint.co.uk/images/www-coin-master-hack-xyz_GM406889139.pdf
    • http://www.copoint.co.uk/images/how-to-get-800-robux-for-free_GM431946152.pdf
    • http://www.copoint.co.uk/images/daily-coin-master-free-spins_GM406889139.pdf
    • http://www.copoint.co.uk/images/how-to-hack-roblox-for-robux_GM431946152.pdf
    • http://www.copoint.co.uk/images/roblox-free-body_GM431946152.pdf
    • http://www.copoint.co.uk/images/roblox-games-that-give-you-free-robux_GM431946152.pdf
    • http://www.copoint.co.uk/images/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdf
    • http://www.copoint.co.uk/images/roblox-help-free-robux_GM431946152.pdf
    • http://www.copoint.co.uk/images/free-tiktok-video_GM835599320.pdf
    • http://www.copoint.co.uk/images/how-to-get-robux-for-free-2021_GM431946152.pdf
    • http://www.copoint.co.uk/images/coin-master-hack-spin-generator_GM406889139.pdf
    • http://www.copoint.co.uk/images/tiktok-followers-for-free_GM835599320.pdf
    • http://www.copoint.co.uk/images/tiradas-coin-master_GM406889139.pdf
    • http://www.copoint.co.uk/images/minecraft-windows-10-free-code_GM479516143.pdf
    • http://www.copoint.co.uk/images/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdf
    • http://www.copoint.co.uk/images/freerobux-co_GM431946152.pdf
    • http://www.copoint.co.uk/images/how-do-you-get-free-food-in-coin-master_GM406889139.pdf
    • http://www.copoint.co.uk/images/free-spin-in-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051db.bin
4ab261b5dd895ee003ad36f13fe687cf42d347c7b39f34be9ff54ba06b6bebae		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51DB 31652 bytes
font_01_sfnt_off000099a0.bin
6ceb6d4e7e4f26f1b6c14a4c499d97f012b532f40b2fee61328fd86a88b04a74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99A0 18808 bytes

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