Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b7bbc56cf68b6ef…

MALICIOUS

PDF

35.1 KB Created: 2021-06-30 08:51:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a113a1c2625a8d90123f070236269139 SHA-1: a8ec202d74524b468b3aec31b351c35495b4800a SHA-256: 6b7bbc56cf68b6efe9b38dea95f01a77854916ab2206982f7f722c903f7cfcac
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a "link farm" heuristic, indicating a strong attempt to redirect users to external sites. The document body, though partially corrupted, suggests lures related to game hacks and exploits, such as 'how to talk to Roblox if you get hacked'. The ML classifier also flagged this PDF as malicious with high confidence. The primary attack pattern involves directing users to potentially malicious content hosted on the listed URLs.

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/how-to-talk-to-roblox-if-you-get-hacked-game-hack
    • http://e-pustaka.stkipadzkia.ac.id/repository/free-musket-model-roblox_GM431946152.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/coin-master-free-spins-and-coins-group_GM406889139.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/coin-master-heaven-free-daily-spins_GM406889139.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/hack-bunny-hollie-roblox-account_GM431946152.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/how-to-get-infinite-robux_GM431946152.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/2021-no-human-verification-hack-for-coin-master_GM406889139.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/free-roblox-robux-hack-generator-club_GM431946152.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/robux-adder_GM431946152.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/robux-free-nuevo-hack_GM431946152.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/roblox-free-templste-stream_GM431946152.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/free-robux-no-verificationor-offer_GM431946152.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/how-to-noclip-in-roblox-jailbreak-without-cheat-engine_GM431946152.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/blogger-coin-master-free-spins_GM406889139.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/how-to-look-cool-on-roblox-free_GM431946152.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/coin-master-generator-hack_GM406889139.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/coin-master-el-tiger-card-free_GM406889139.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/free-robux-place_GM431946152.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/how-to-make-your-own-hack-for-roblox_GM431946152.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/fake-robux-generator-for-free_GM431946152.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/blox-world-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_off000031a3.bin
e425a71dcec5b15c460a4499422e04cfbf663778d1a20ec55dd01000b9c62ac9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x31A3 22168 bytes
font_01_sfnt_off000062c8.bin
4378906d51216e1c27be002f040c5516709c6e27702e65cdf2a5b53284fd9db1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62C8 19400 bytes

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