Malicious PDF — malware analysis report

Static analysis result for SHA-256 676ecfccc911ad34…

MALICIOUS

PDF

47.3 KB Created: 2021-06-09 07:32:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 707ee93b3945f6a1c28814018b16c06d SHA-1: d7dc2063bb5c9e9963bf532a1b91c85aed2b59d0 SHA-256: 676ecfccc911ad342041021ac98b3c22a4f9dfc8a7cf6e42169b9335ddeb90e2
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains a large number of embedded links, many of which are related to game hacks and free in-game currency, suggesting a lure for users to click on malicious URLs. The ML classifier also flagged this PDF as malicious with high confidence. The presence of a "download button" heuristic further supports the malicious intent of directing users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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 https://netcdn.tw/app/431946152/cool-free-roblox-charecters-uu-game-hack
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-attack-link_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-daily-free-spins-blogspot_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-hack-pokes-roblox-account_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/robux-hack-2021_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-spins-link-blogspot-2021_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/http-bit-ly-coin-master-hack_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/2021-no-human-verification-hack-for-coin-master_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/earn-free-robux-on-roblox_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-roblox-accounts-with-robux_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-coins-link_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-minecraft-server-hosting-24-7_GM479516143.pdf
    • http://elibrary.smknesbu.sch.id/repository/instagram-coin-master-free-spins_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-free-roblox-hair_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-30-tiktok-likes_GM835599320.pdf
    • http://elibrary.smknesbu.sch.id/repository/daily-coin-master-free-spin-link_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-spin-link-hack_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-hack-without-verification_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/minecraft-free-download-android-apk-014-0_GM479516143.pdf
    • http://elibrary.smknesbu.sch.id/repository/roblox-phantom-forces-hack-aimbot-redboy_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/ways-to-get-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004ff5.bin
3870f8cecf6a65ac8ab2f37cf44b84e9ff1b62667059e27a57f649d8e110cc44		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FF5 25612 bytes
font_01_sfnt_off00008b0f.bin
fc92a80cefddbcc51cb4ecd7284aa73b746cbd66adcf1d96110f0323ec06b51f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B0F 2812 bytes
font_02_sfnt_off000094b0.bin
6b8693db9854b964834ca63faef4b69069467a1c01451779b73b7f3a36f491c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94B0 18772 bytes

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