Malicious PDF — malware analysis report

Static analysis result for SHA-256 f09fa17328cff688…

MALICIOUS

PDF

34.8 KB Created: 2021-07-04 12:34:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5f1d59193b4e319784c0cf4cc94d2a0d SHA-1: fa41810e92a44c1851270f40c1e9690c14dc812a SHA-256: f09fa17328cff688307e43cd7cf4d8061309c00f27cfada031a16dd383ac9515
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous embedded links, including a primary URL pointing to 'netcdn.tw'. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to drive traffic or distribute malicious content. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were explicitly extracted, the presence of numerous external links and the ML detection strongly suggest a malicious intent, likely related to phishing or malware distribution.

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/codes-jeu-hack-roblox-game-hack
    • https://library.itn.ac.id/perpusitn/repository/how-to-get-the-roblox-20-body-for-free_GM431946152.pdf
    • https://library.itn.ac.id/perpusitn/repository/cute-free-roblox-outfits_GM431946152.pdf
    • https://library.itn.ac.id/perpusitn/repository/online-free-roblox-no-download_GM431946152.pdf
    • https://library.itn.ac.id/perpusitn/repository/roblox-god-mode-hack_GM431946152.pdf
    • https://library.itn.ac.id/perpusitn/repository/free-robux-codes-on-ios_GM431946152.pdf
    • https://library.itn.ac.id/perpusitn/repository/roblox-how-to-get-free-money-in-jailbreak-november-2021_GM431946152.pdf
    • https://library.itn.ac.id/perpusitn/repository/get-free-spins-on-coin-master_GM406889139.pdf
    • https://library.itn.ac.id/perpusitn/repository/how-to-spawn-hack-in-apocolips-rising-roblox-2021_GM431946152.pdf
    • https://library.itn.ac.id/perpusitn/repository/cheats-that-make-you-get-staff-on-roblox_GM431946152.pdf
    • https://library.itn.ac.id/perpusitn/repository/aprender-a-hackear-roblox_GM431946152.pdf
    • https://library.itn.ac.id/perpusitn/repository/how-to-get-roblox-on-ps4-for-free_GM431946152.pdf
    • https://library.itn.ac.id/perpusitn/repository/free-robux-with-no-survey_GM431946152.pdf
    • https://library.itn.ac.id/perpusitn/repository/how-to-get-free-robux-on-roblox-hack_GM431946152.pdf
    • https://library.itn.ac.id/perpusitn/repository/roblox-arc-of-the-elements-phoenix-hack_GM431946152.pdf
    • https://library.itn.ac.id/perpusitn/repository/jailbreak-geld-cheaten-roblox_GM431946152.pdf
    • https://library.itn.ac.id/perpusitn/repository/coin-master-hacks-and-cheats_GM406889139.pdf
    • https://library.itn.ac.id/perpusitn/repository/minecraft-free-download-mobile_GM479516143.pdf
    • https://library.itn.ac.id/perpusitn/repository/bird-pet-free-roblox_GM431946152.pdf
    • https://library.itn.ac.id/perpusitn/repository/roblox-zombie-rush-hack-script_GM431946152.pdf
    • https://library.itn.ac.id/perpusitn/repository/coin-master-coins-free_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000323d.bin
f510068e7d58e20d0f3eed79a1a6c6c82918e89489f7a19d7d7dbbb412d9a455		 pdf-font-stream PDF embedded font (sfnt) at offset 0x323D 22096 bytes
font_01_sfnt_off0000632a.bin
7346b28ec6d79d3cc53b6b2e0d188747014da01e125111d283e7a2c9b3de2bae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x632A 18952 bytes

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