Malicious PDF — malware analysis report

Static analysis result for SHA-256 3df15d918a56a45e…

MALICIOUS

PDF

32.6 KB Created: 2021-06-18 10:56:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 57a223a541ede7df62ee7d9cc9c85677 SHA-1: 0fdf225209944f878f1a0695bf7948e65bb193b0 SHA-256: 3df15d918a56a45ed22b777774d0c7c740bf902a749d5336b922a2926d2c7e9d
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links and a "call-to-action" phrase, strongly suggesting a phishing or scam attempt. The primary URL, http://netcdn.co/app/431946152/make-free-robux-game-hack, likely serves as a lure for malicious content. The heuristic PDF_SEO_LINK_FARM indicates a large number of external links, further supporting the scam or malware distribution vector. No scripts were extracted, but the document's structure and content point towards a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/make-free-robux-game-hack
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/how-to-get-free-cards-on-coin-master_GM406889139.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/muscle-roblox-manequin-free_GM431946152.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/coin-master-spins-for-free_GM406889139.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/coin-master-hack-app-for-ios_GM406889139.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/no-hack-free-robux_GM431946152.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/free-coins-for-flip-master-online_GM406889139.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/free-roblox-characters_GM431946152.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/how-do-you-hack-minecraft_GM479516143.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/get-free-spins-coin-master_GM406889139.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/25-free-spins-coin-master_GM406889139.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/free-coin-master-spins-2021-link_GM406889139.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/get-2021-free-spins-on-coin-master_GM406889139.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/kachifpro_GM406889139.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/coin-master-free-coins-and-spins-group_GM406889139.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/how-to-get-free-robux-on-roblox-studio_GM431946152.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/minecraft-pe-hacks-ios_GM479516143.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/how-to-hack-a-roblox-account-2021_GM431946152.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/free-robux-generator-no-human-verification_GM431946152.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/you-promised-my-son-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002b1e.bin
2d30b8a5090334e80cc8ad2edb57b4f39fe891b821ffd16581135cbacb3f5ab7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B1E 21904 bytes
font_01_sfnt_off00005b13.bin
c88c51858077ade3b8502eae8608ab899416d1b370acff3e00cfd054b98fdbe6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B13 18896 bytes

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