Malicious PDF — malware analysis report

Static analysis result for SHA-256 111ab444a505f339…

MALICIOUS

PDF

49.2 KB Created: 2021-06-09 00:43:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1708b6c61538b204a6dc367e7bf3ef70 SHA-1: 3015b3dac55143664c3352af76c03c86e6f2efc0 SHA-256: 111ab444a505f339b51eeeeca70c215933980d6d5566ffdecb31b2f3e753bb7d
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which are SEO-optimized and point to pages related to game hacks and free in-game currency. This suggests a link farm or a lure to potentially malicious content. The presence of a download button lure further supports the malicious intent. No scripts were extracted, but the PDF structure itself is designed to redirect users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/very-very-easy-hack-roblox-game-hack
    • http://perpus.iainkediri.ac.id/pasca/repository/coin-master-free-spins-and-coins-link-today_GM406889139.pdf
    • http://perpus.iainkediri.ac.id/pasca/repository/free-robux-easy-and-fast_GM431946152.pdf
    • http://perpus.iainkediri.ac.id/pasca/repository/roblox-free-robux-no-verification_GM431946152.pdf
    • http://perpus.iainkediri.ac.id/pasca/repository/tiktok-free-80_GM835599320.pdf
    • http://perpus.iainkediri.ac.id/pasca/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdf
    • http://perpus.iainkediri.ac.id/pasca/repository/coin-master-game-hack-link_GM406889139.pdf
    • http://perpus.iainkediri.ac.id/pasca/repository/krnl-roblox_GM431946152.pdf
    • http://perpus.iainkediri.ac.id/pasca/repository/coin-master-online-free-spin_GM406889139.pdf
    • http://perpus.iainkediri.ac.id/pasca/repository/can-you-actually-get-free-robux_GM431946152.pdf
    • http://perpus.iainkediri.ac.id/pasca/repository/coin-master-claim-free-spins_GM406889139.pdf
    • http://perpus.iainkediri.ac.id/pasca/repository/minecraft-server-free-trial_GM479516143.pdf
    • http://perpus.iainkediri.ac.id/pasca/repository/is-minecraft-free-on-pc_GM479516143.pdf
    • http://perpus.iainkediri.ac.id/pasca/repository/free-robux-no-human-verification-2021_GM431946152.pdf
    • http://perpus.iainkediri.ac.id/pasca/repository/play-full-version-of-minecraft-for-free-no-download_GM479516143.pdf
    • http://perpus.iainkediri.ac.id/pasca/repository/how-to-win-robux_GM431946152.pdf
    • http://perpus.iainkediri.ac.id/pasca/repository/roblox-fly-hack_GM431946152.pdf
    • http://perpus.iainkediri.ac.id/pasca/repository/roblox-hack-tool-cheat-hackercon_GM431946152.pdf
    • http://perpus.iainkediri.ac.id/pasca/repository/how-to-get-free-coins-for-coin-master_GM406889139.pdf
    • http://perpus.iainkediri.ac.id/pasca/repository/free-spins-coin-master-hack-2021_GM406889139.pdf
    • http://perpus.iainkediri.ac.id/pasca/repository/free-minecraft-skins-java_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000528a.bin
fa8dc730fae67b671c6f24275f1e2e2045300aaa4fbe6888ad06e85e5e663bb0		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x528A 27796 bytes
font_01_sfnt_off000092d0.bin
02b35010e2614e3cc95ac6414c49295350c91fdfcc4b4cad27ffdbc10e80df7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92D0 2912 bytes
font_02_sfnt_off00009ccd.bin
14c8e0f7e25f05d9aebc1a5ea2d661d8405b04e9307fa2888cefc31b750be437		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CCD 18496 bytes

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