Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b61290d4f58337c…

MALICIOUS

PDF

35.1 KB Created: 2021-06-29 23:03:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b3837b4b32db76e06cb614da8ba15d06 SHA-1: f22866a6021ef68fa47e45feb504d39308e1f7e6 SHA-256: 8b61290d4f58337c1a221e48178e347d6145d1ced746c948fdb8b2265a1ce936
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous embedded links, forming a link farm, and a prominent call-to-action for 'Free Robux'. The primary URL, http://netcdn.co/app/431946152/click-the-button-for-free-robux-game-hack, suggests a lure for potentially malicious downloads or phishing. The ML classifier strongly indicated maliciousness, supporting the assessment of a deceptive content delivery mechanism.

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/click-the-button-for-free-robux-game-hack
    • http://pustakafpsi.uin-suska.ac.id/repository/minecraft-bedrock-free-with-java_GM479516143.pdf
    • http://pustakafpsi.uin-suska.ac.id/repository/how-to-get-free-robux-easy-on-ipad_GM431946152.pdf
    • http://pustakafpsi.uin-suska.ac.id//repository/without-pokemon-go-free-download_GM1094591345.pdf
    • http://pustakafpsi.uin-suska.ac.id/repository/free-robux-earn-robux_GM431946152.pdf
    • http://pustakafpsi.uin-suska.ac.id/repository/free-robux-no-human-verification-and-no-download_GM431946152.pdf
    • http://pustakafpsi.uin-suska.ac.id/repository/best-hacks-for-counter-blox-roblox-offensive_GM431946152.pdf
    • http://pustakafpsi.uin-suska.ac.id/repository/lifting-simulator-roblox-hack-no-human-verification_GM431946152.pdf
    • http://pustakafpsi.uin-suska.ac.id/repository/how-to-cheat-in-eviction-notice-roblox_GM431946152.pdf
    • http://pustakafpsi.uin-suska.ac.id//repository/robux-giver_GM431946152.pdf
    • http://pustakafpsi.uin-suska.ac.id/repository/roblox-new-lighting-gmae-free_GM431946152.pdf
    • http://pustakafpsi.uin-suska.ac.id//repository/is-there-a-free-version-of-minecraft_GM479516143.pdf
    • http://pustakafpsi.uin-suska.ac.id/repository/hacking-my-brothers-roblox-acaawaant_GM431946152.pdf
    • http://pustakafpsi.uin-suska.ac.id/repository/roblox-weight-lifting-simulator-afk-speed-cheats_GM431946152.pdf
    • http://pustakafpsi.uin-suska.ac.id/repository/super-jump-cheat-roblox-jailbreak_GM431946152.pdf
    • http://pustakafpsi.uin-suska.ac.id/repository/https-wwwfree-robux-at-http-rex-eu5org_GM431946152.pdf
    • http://pustakafpsi.uin-suska.ac.id/repository/coin-master-free-coins-generator_GM406889139.pdf
    • http://pustakafpsi.uin-suska.ac.id//repository/coin-master-free-spin-generator-without-human-verification_GM406889139.pdf
    • http://pustakafpsi.uin-suska.ac.id/repository/dumbdog419playz-free-robux-hack_GM431946152.pdf
    • http://pustakafpsi.uin-suska.ac.id/repository/daily-free-spins-coin-master-app_GM406889139.pdf
    • http://pustakafpsi.uin-suska.ac.id/repository/roblox-unlimited-robux-hack-no-human-verification_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030e5.bin
39c0dd66f12903f9ea8b5adbab45e17e197a07191b3220739249f5843ee4e3db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x30E5 22564 bytes
font_01_sfnt_off0000635c.bin
b9f99d2c988b3e862eb76977cd355b8a769eb7add3fe734d5f3dba607e864acc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x635C 19348 bytes

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