Malicious PDF — malware analysis report

Static analysis result for SHA-256 22cc7114b61e745c…

MALICIOUS

PDF

34.2 KB Created: 2021-07-06 06:08:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: fda3d6f7361f143570b94f2297772b89 SHA-1: fefa9960a6568d204c62689f0f96adb2f88f3fcb SHA-256: 22cc7114b61e745c347af9ff148034fc57d37b5dabc3cbd8b6c7805da5d94c47
102 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are hosted on domains related to 'perpus.stmkg.ac.id' and 'netcdn.tw'. These links, along with the document body text, promote the idea of obtaining free in-game currency or hacks for popular games. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a tactic to attract users through search engine optimization for malicious content. The ML classifier also strongly flagged this PDF as malicious.

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/como-tener-robux-gratis-2021-hack-game-hack
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/how-to-hack-accounts-on-roblox-2021_GM431946152.pdf
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/tiny-tanks-roblox-hack-2021_GM431946152.pdf
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/roblox-op-weapons-in-your-hack_GM431946152.pdf
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/can-u-get-free-robux_GM431946152.pdf
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/coin-master-free-spin-today_GM406889139.pdf
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/how-to-draw-on-free-draw-roblox_GM431946152.pdf
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/coin-master-free-spins-link-no-verification-code_GM406889139.pdf
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/roblox-cheat-codes-xbox-one_GM431946152.pdf
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/infinite-robux-cheat_GM431946152.pdf
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/descargar-roblox-apk-hack_GM431946152.pdf
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/robux-codes-for-free-robux_GM431946152.pdf
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/free-robux-no-apps_GM431946152.pdf
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/roblox-robux-hack-generator-2021_GM431946152.pdf
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/coin-master-free-spins-promo-code_GM406889139.pdf
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/chisel-and-bits-mod-pe_GM479516143.pdf
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/tc3-roblox-hack_GM431946152.pdf
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/coin-master-free-spin-and-coin_GM406889139.pdf
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/how-can-i-get-free-robux_GM431946152.pdf
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/link-for-free-spins-on-coin-master_GM406889139.pdf
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/2021-free-spins-on-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fc0.bin
2521b93b6223dbd80d64adb48ac07dfe465371c6eb73b6c02f7c17dea3097567		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2FC0 21724 bytes
font_01_sfnt_off00005f3b.bin
f29cc4d37d28597d97c702dfc590d33b46d6233c3e5f04aefd89ab1a2937f202		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F3B 19420 bytes

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