Malicious PDF — malware analysis report

Static analysis result for SHA-256 47c381eb9142440e…

MALICIOUS

PDF

33.9 KB Created: 2021-07-05 15:08:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 46dbd755b6e8afd1af18bb6f6c85d797 SHA-1: a20c0521e815bcfe7b2fc900afd4db90357fb2cd SHA-256: 47c381eb9142440e3cad057dd6fd3da962f467c1738af43a6315060f7ba3ed2c
102 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 sites offering 'free Robux' or 'Coin Master' cheats. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a malicious intent to drive traffic to potentially harmful websites. The presence of a 'Download Button' lure further supports the idea that users are being prompted to click through to malicious content.

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/free-robux-roblox-promo-codes-game-hack
    • http://lib.fekon.untad.ac.id/repository/hack-to-get-the-legendary-pet-in-adopt-me-roblox_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/coin-master-on-facebook_GM406889139.pdf
    • http://lib.fekon.untad.ac.id/repository/coin-master-hack-apk-with-fb-login_GM406889139.pdf
    • http://lib.fekon.untad.ac.id/repository/how-to-get-free-unlimited-robux-glitch_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/how-often-pubg-uc-appointments_GM1330123889.pdf
    • http://lib.fekon.untad.ac.id/repository/free-acounta-for-roblox_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/how-to-get-free-coins-on-coin-master-iphone_GM406889139.pdf
    • http://lib.fekon.untad.ac.id/repository/free-knives-in-assassin-roblox_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/coin-master-free-spins-gratis_GM406889139.pdf
    • http://lib.fekon.untad.ac.id/repository/roblox-contrasea-hack_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/how-to-get-free-spins-on-coin-master_GM406889139.pdf
    • http://lib.fekon.untad.ac.id/repository/robux-hack-tools_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/robux-hack-real-no-survey_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/get-more-robux_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/cruise-ship-tycoon-money-cheat-roblox_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/free-robux-jeux-roblox_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/free-spins-coin-master-march-2021_GM406889139.pdf
    • http://lib.fekon.untad.ac.id/repository/free-robux-without-no-verification_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/kazok-robux-hack_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/robux-free-gift-card_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002de2.bin
ceb0b63051027cbeeaa3811a45674e2a52357674001858c35bf3b7bca86d56a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2DE2 22016 bytes
font_01_sfnt_off00005e7b.bin
a452d0c191873ed4d1cd88fa82656ca938fba3e74f496bef56901f9d10460b65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E7B 19380 bytes

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