Malicious PDF — malware analysis report

Static analysis result for SHA-256 aec07adf13483f55…

MALICIOUS

PDF

44.4 KB Created: 2021-05-16 05:46:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 08c9b6c2acbd7e9ca5330ceb30c149f3 SHA-1: 969c27eee256b28d496e50c1bc2cc9401a088894 SHA-256: aec07adf13483f55121033db884d49a23ad50931a977f3c4203555fb38a79722
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various game-related hack and free item sites. The ML classifier also flagged this PDF as malicious with high confidence. The primary attack pattern appears to be SEO spam or a lure to drive traffic to potentially malicious or scam-related websites.

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 https://netcdn.xyz/app/406889139/coin-master-free-spins-link-2021-blogger-game-hack
    • http://webstan.be/images/game-coin-master-hack_GM406889139.pdf
    • http://webstan.be/images/how-to-get-minecraft-pocket-edition-for-free_GM479516143.pdf
    • http://webstan.be/images/free-robux-com_GM431946152.pdf
    • http://webstan.be/images/robux-com-free_GM431946152.pdf
    • http://webstan.be/images/how-to-setup-a-minecraft-server-for-free_GM479516143.pdf
    • http://webstan.be/images/www-rubux_GM431946152.pdf
    • http://webstan.be/images/free-robux-hack-no-human-verification_GM431946152.pdf
    • http://webstan.be/images/minecraft-xbox-360-free-download-code_GM479516143.pdf
    • http://webstan.be/images/how-to-get-free-robux-on-phone_GM431946152.pdf
    • http://webstan.be/images/get-free-spins-in-coin-master_GM406889139.pdf
    • http://webstan.be/images/official-coin-master-free-spins_GM406889139.pdf
    • http://webstan.be/images/completed-coin-master-hack_GM406889139.pdf
    • http://webstan.be/images/how-to-get-free-coins-in-coin-master_GM406889139.pdf
    • http://webstan.be/images/coin-master-date-and-time-hack_GM406889139.pdf
    • http://webstan.be/images/free-spins-coin-master-blogspot_GM406889139.pdf
    • http://webstan.be/images/coin-master-free-coins-link-2021-deutsch_GM406889139.pdf
    • http://webstan.be/images/free-robux-codes-no-verification_GM431946152.pdf
    • http://webstan.be/images/roblox-free-hair-girl_GM431946152.pdf
    • http://webstan.be/images/collect-free-spins-for-coin-master_GM406889139.pdf
    • http://webstan.be/images/www-roblox-com-robux-free_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049aa.bin
f17f25cb19d4cfd64892f369067dc0e24f96921469e5b3041dc75968188b3913		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49AA 29892 bytes
font_01_sfnt_off000088eb.bin
6906a9989d8784d6f8a9776352e09c335330dbd77f725755b0e4967acb3193dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88EB 19036 bytes

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