Malicious PDF — malware analysis report

Static analysis result for SHA-256 42d1586e7aa06495…

MALICIOUS

PDF

35.4 KB Created: 2021-06-19 05:20:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 7a566d9fc0c199e63dfd8b7669ca2605 SHA-1: 64e0adf2bf7f398eaf286219ec5d1cd6835cf9fd SHA-256: 42d1586e7aa06495b4aa92a12f713dcfbb2d87bbd76fc987a53e9b4bad17426c
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs that form a link farm, likely intended to direct users to scam websites offering 'free Robux' or game cheats. The ML classifier strongly indicated maliciousness, and the presence of multiple external links suggests an attempt to redirect users to potentially harmful content or phishing sites. No scripts were extracted, but the document's structure and embedded links 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/free-robux-generator-2021-gamingthix-game-hack
    • http://digilibfisip.unla.ac.id/repository/roblox-restaurant-tycoon-cheat-engine_GM431946152.pdf
    • http://digilibfisip.unla.ac.id/repository/how-do-u-get-free-robux_GM431946152.pdf
    • http://digilibfisip.unla.ac.id/repository/coin-master-no-download-app-but-play-for-free_GM406889139.pdf
    • http://digilibfisip.unla.ac.id/repository/coin-master-free-spin-link-today-2021_GM406889139.pdf
    • http://digilibfisip.unla.ac.id/repository/free-roblox-accounts-with-robux-2021-list_GM431946152.pdf
    • http://digilibfisip.unla.ac.id/repository/coin-master-gold-cards-free-link_GM406889139.pdf
    • http://digilibfisip.unla.ac.id/repository/free-robux-no-verification-2021_GM431946152.pdf
    • http://digilibfisip.unla.ac.id/repository/minecraft-wurst-client_GM479516143.pdf
    • http://digilibfisip.unla.ac.id/repository/coin-master-free-spins-link-2021-app_GM406889139.pdf
    • http://digilibfisip.unla.ac.id/repository/microsoft-bing-free-robux_GM431946152.pdf
    • http://digilibfisip.unla.ac.id/repository/free-roblox-injector_GM431946152.pdf
    • http://digilibfisip.unla.ac.id/repository/how-do-you-get-roblox-money_GM431946152.pdf
    • http://digilibfisip.unla.ac.id/repository/coin-master-hack-version-download-2021_GM406889139.pdf
    • http://digilibfisip.unla.ac.id/repository/scarf-for-free-roblox_GM431946152.pdf
    • http://digilibfisip.unla.ac.id/repository/how-to-hack-roblox-2021-mac_GM431946152.pdf
    • http://digilibfisip.unla.ac.id/repository/hack-de-cuenta1-roblox_GM431946152.pdf
    • http://digilibfisip.unla.ac.id/repository/how-to-get-priviate-server-on-roblox-for-free_GM431946152.pdf
    • http://digilibfisip.unla.ac.id/repository/how-to-get-java-minecraft-free_GM479516143.pdf
    • http://digilibfisip.unla.ac.id/repository/free-spin-card-exchange-coin-master_GM406889139.pdf
    • http://digilibfisip.unla.ac.id/repository/coin-master-hack-1021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030f5.bin
73a890df4ef76f59a2eb00ff574ba9fc7fe62e94c7b885fe8cabc926228f1910		 pdf-font-stream PDF embedded font (sfnt) at offset 0x30F5 22516 bytes
font_01_sfnt_off00006359.bin
d17803c06e520f6b690bb1bf3e5245a92da4b644857e5185a371e0129d37920f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6359 19768 bytes

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