Malicious PDF — malware analysis report

Static analysis result for SHA-256 735ed41efe85fa89…

MALICIOUS

PDF

43.6 KB Created: 2021-06-03 07:01:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 9636b590e07f0f13e7c936814570e9a9 SHA-1: 3aa22e965476e5168a63738d68b546a9f2a41afa SHA-256: 735ed41efe85fa8922dc265ddab097653b130b9302b1da00aaecb92eabc676b2
102 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which are SEO-optimized to appear as legitimate resources for game cheats and free spins. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a phishing or scam attempt. The ML classifier also strongly flagged this PDF as malicious, reinforcing the assessment that it is designed to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/406889139/coin-master-free-spin-link-new-game-hack
    • http://pustaka.polbangtan-gowa.ac.id//repository/unlimited-free-spins-coin-master_GM406889139.pdf
    • http://pustaka.polbangtan-gowa.ac.id/repository/free-free-robux_GM431946152.pdf
    • http://pustaka.polbangtan-gowa.ac.id/repository/minecraft-pocket-edition-download-free-pe-calculator_GM479516143.pdf
    • http://pustaka.polbangtan-gowa.ac.id//repository/how-to-get-free-robux-without-downloading-anything_GM431946152.pdf
    • http://pustaka.polbangtan-gowa.ac.id//repository/coin-master-spin-hack_GM406889139.pdf
    • http://pustaka.polbangtan-gowa.ac.id/repository/coin-master-free-spins-link-2021-today_GM406889139.pdf
    • http://pustaka.polbangtan-gowa.ac.id/repository/coin-master-free-spins-link-download-today_GM406889139.pdf
    • http://pustaka.polbangtan-gowa.ac.id//repository/how-do-you-hack-roblox_GM431946152.pdf
    • http://pustaka.polbangtan-gowa.ac.id/repository/coin-master-free-spin-2912-2021_GM406889139.pdf
    • http://pustaka.polbangtan-gowa.ac.id/repository/how-to-get-minecraft-for-free-on-ps4_GM479516143.pdf
    • http://pustaka.polbangtan-gowa.ac.id//repository/coin-master-heaven-free-spins-today_GM406889139.pdf
    • http://pustaka.polbangtan-gowa.ac.id/repository/coin-master-cracked-apk-free-download_GM406889139.pdf
    • http://pustaka.polbangtan-gowa.ac.id/repository/coin-monster_GM406889139.pdf
    • http://pustaka.polbangtan-gowa.ac.id//repository/getrobux-info_GM431946152.pdf
    • http://pustaka.polbangtan-gowa.ac.id/repository/hack-coin-master-xyz_GM406889139.pdf
    • http://pustaka.polbangtan-gowa.ac.id//repository/how-to-change-roblox-name-for-free_GM431946152.pdf
    • http://pustaka.polbangtan-gowa.ac.id/repository/free-roblox-groups-with-funds_GM431946152.pdf
    • http://pustaka.polbangtan-gowa.ac.id/repository/free-bedrock-minecraft_GM479516143.pdf
    • http://pustaka.polbangtan-gowa.ac.id/repository/minecraft-hacks-115-2_GM479516143.pdf
    • http://pustaka.polbangtan-gowa.ac.id//repository/www-roblox-com-robux-free_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000051d9.bin
df3f421f1d073414d9adc3ccca0359e0c67e5955fca33415a1a8211e97299e22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51D9 23904 bytes
font_01_sfnt_off000087dc.bin
416b3ddd7174a4565faeadac95af623a4bced54c3ba49935edef75467b8b172c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87DC 18220 bytes

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