Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f3f4d953710af6b…

MALICIOUS

PDF

35.0 KB Created: 2021-06-26 03:19:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 80bee1f40fd5e1828913fb9b78365bf3 SHA-1: ce835888d2c9bee3b26a7f128f0f3dbf72e9f1e5 SHA-256: 1f3f4d953710af6b3efc8ab56693276625bf38132525965ba83049800b30db1f
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF document contains numerous embedded URLs and a document body that promotes game cheats and hacks, suggesting a lure for users to download malicious files. The ML classifier strongly flagged this PDF as malicious, and the presence of a large number of external links further supports a malicious intent to redirect users to potentially harmful content. No scripts were extracted from this sample.

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/roblox-jailbreak-cheat-speed-hack-2021-game-hack
    • http://perpus.ft.undip.ac.id/pustaka/repository/download-roblox-hack-apk-pc_GM431946152.pdf
    • http://perpus.ft.undip.ac.id/pustaka/repository/how-to-know-if-you-got-hacked-on-roblox_GM431946152.pdf
    • http://perpus.ft.undip.ac.id/pustaka/repository/how-to-get-free-shirts-on-roblox-208-november_GM431946152.pdf
    • http://perpus.ft.undip.ac.id/pustaka/repository/how-to-buy-pubg-uc-for-free_GM1330123889.pdf
    • http://perpus.ft.undip.ac.id/pustaka/repository/minecraft-pc-download-free-full-version_GM479516143.pdf
    • http://perpus.ft.undip.ac.id/pustaka/repository/how-to-hack-in-roblox-hoops_GM431946152.pdf
    • http://perpus.ft.undip.ac.id/pustaka/repository/roblox-how-to-hack-accoutns_GM431946152.pdf
    • http://perpus.ft.undip.ac.id/pustaka/repository/roblox-free-skin_GM431946152.pdf
    • http://perpus.ft.undip.ac.id/pustaka/repository/300-free-robux_GM431946152.pdf
    • http://perpus.ft.undip.ac.id/pustaka/repository/free-robux-generator-2021-no-survey_GM431946152.pdf
    • http://perpus.ft.undip.ac.id/pustaka/repository/coin-master-free-coins-link-2021-deutsch_GM406889139.pdf
    • http://perpus.ft.undip.ac.id/pustaka/repository/minecraft-free-online_GM479516143.pdf
    • http://perpus.ft.undip.ac.id/pustaka/repository/how-to-hack-any-person-in-roblox_GM431946152.pdf
    • http://perpus.ft.undip.ac.id/pustaka/repository/minecraft-free-online-unblocked_GM479516143.pdf
    • http://perpus.ft.undip.ac.id/pustaka/repository/roblox-hack-unlimited-robux_GM431946152.pdf
    • http://perpus.ft.undip.ac.id/pustaka/repository/coin-master-free-spin-app-2021_GM406889139.pdf
    • http://perpus.ft.undip.ac.id/pustaka/repository/roblox-top-battle-games-read-online-free_GM431946152.pdf
    • http://perpus.ft.undip.ac.id/pustaka/repository/free-coins-and-spins-2021_GM406889139.pdf
    • http://perpus.ft.undip.ac.id/pustaka/repository/coin-master-game-hack-app-download_GM406889139.pdf
    • http://perpus.ft.undip.ac.id/pustaka/repository/minecraft-book-collection_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003078.bin
59aabb6703315ec9222a1df612cbfa2363e027dc4a405744a9112e66264738b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3078 22000 bytes
font_01_sfnt_off0000610f.bin
e3a870039d2c0cfa9bc36873babb17050ba45c3e71eddcaf6ed587d96f8e64ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x610F 19964 bytes

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