Malicious PDF — malware analysis report

Static analysis result for SHA-256 195ca173a53126d4…

MALICIOUS

PDF

33.6 KB Created: 2021-06-20 08:08:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5147f2afa45f0282d7ca11dd90b9deed SHA-1: 91b43d78911f929dd8de0270cff987c24e48b6e7 SHA-256: 195ca173a53126d40621bacb7e3cb7db14d7c12a10189b83a9b5d664e71519a9
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are SEO-optimized and related to game hacks and free currency for popular games. The ML classifier strongly indicated maliciousness, and the PDF structure suggests a link farm designed to drive traffic to potentially malicious or phishing sites. No scripts were extracted, but the embedded URLs and the heuristic findings point to a social engineering attack.

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.co/app/431946152/claim-free-robux-roblox-game-hack
    • http://digilibfisip.unla.ac.id/repository/coin-master-daily-free-spins-link-blogspot_GM406889139.pdf
    • http://digilibfisip.unla.ac.id/repository/free-faces-on-roblox-names_GM431946152.pdf
    • http://digilibfisip.unla.ac.id/repository/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdf
    • http://digilibfisip.unla.ac.id/repository/www-claim-gg-to-earn-free-robux_GM431946152.pdf
    • http://digilibfisip.unla.ac.id/repository/easy-ways-to-get-free-robux_GM431946152.pdf
    • http://digilibfisip.unla.ac.id/repository/coin-master-free-spins-1-coin-master_GM406889139.pdf
    • http://digilibfisip.unla.ac.id/repository/how-to-hack-someone-on-roblox_GM431946152.pdf
    • http://digilibfisip.unla.ac.id/repository/minecraft-hack-2021_GM479516143.pdf
    • http://digilibfisip.unla.ac.id/repository/free-full-colour-brown-pant-roblox_GM431946152.pdf
    • http://digilibfisip.unla.ac.id/repository/coin-master-game-2021-free-spin-link_GM406889139.pdf
    • http://digilibfisip.unla.ac.id/repository/free-coins-and-spins-in-coin-master_GM406889139.pdf
    • http://digilibfisip.unla.ac.id/repository/free-roblox-exploits-unpatched_GM431946152.pdf
    • http://digilibfisip.unla.ac.id/repository/roblox-game-free-download_GM431946152.pdf
    • http://digilibfisip.unla.ac.id/repository/free-printable-roblox-thank-you-tags_GM431946152.pdf
    • http://digilibfisip.unla.ac.id/repository/how-to-get-free-gamepasses-on-roblox_GM431946152.pdf
    • http://digilibfisip.unla.ac.id/repository/roblox-1x1x1x1-hack_GM431946152.pdf
    • http://digilibfisip.unla.ac.id/repository/coin-master-free-spins-bit-ly_GM406889139.pdf
    • http://digilibfisip.unla.ac.id/repository/roblox-money-hack_GM431946152.pdf
    • http://digilibfisip.unla.ac.id/repository/bit-slicer-roblox-all-hacks_GM431946152.pdf
    • http://digilibfisip.unla.ac.id/repository/coin-master-hack_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e79.bin
9aa7bcc7d1325e98222022360b14bf833da108afeff160c53398902911b8249b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2E79 21740 bytes
font_01_sfnt_off00005e05.bin
dfc8721fbf6b4988d00971a58b16fe325011594e1ee6efadf5a4fdcf2df05fca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E05 19168 bytes

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