Malicious PDF — malware analysis report

Static analysis result for SHA-256 415c73d79c849f19…

MALICIOUS

PDF

35.1 KB Created: 2021-07-01 21:31:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 63962bf0ff906e586e08a3bbeca497f0 SHA-1: 78013d0a4770bb8ae5a6074ea713e06c3ff01166 SHA-256: 415c73d79c849f19d8633997c5e4d09c8db2c1fe7d8a1e2e891561e4ce1f5014
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many of which are presented as download opportunities for in-game currency or hacks. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to attract users with deceptive promises. The ML classifier also strongly flagged this PDF as malicious, reinforcing the likelihood of a phishing or malware distribution attempt.

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/free-robux-instantly-game-hack
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/coin-master-hack-version-2021-download_GM406889139.pdf
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdf
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/coin-master-hack-2021-app_GM406889139.pdf
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/coin-master-hack-tool-v1-9-apk_GM406889139.pdf
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/coinmasterfreespins_GM406889139.pdf
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-accounts_GM431946152.pdf
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-easy-no-download_GM431946152.pdf
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/cute-outfits-for-free-on-roblox_GM431946152.pdf
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/minecraft-windows-10-free-with-java_GM479516143.pdf
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-2021_GM431946152.pdf
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/what-games-on-roblox-give-you-free-robux_GM431946152.pdf
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/roblox-old-guest-shirt-free_GM431946152.pdf
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/boku-no-roblox-hack_GM431946152.pdf
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/adidas-t-shirt-for-roblox-free_GM431946152.pdf
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-codes_GM431946152.pdf
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/roblox-gift-card-for-free_GM431946152.pdf
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/free-spins-for-coin-master-2021_GM406889139.pdf
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/omggh-new-roblox-hack-lumber-tycoon-gui_GM431946152.pdf
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/como-hackear-coin-master-espaol_GM406889139.pdf
    • http://elearning.mis-arrahmahuk.sch.id/__statics/gudangsoal/files/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031f9.bin
d7fbf2a3e31bfafd9efa4d296aa68b9c26eee4480fbc17a3560a2745dd4659b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x31F9 22464 bytes
font_01_sfnt_off0000642b.bin
2ca9d11195de567abf4a703037006073732e9aee935d3c5754ca148439903055		 pdf-font-stream PDF embedded font (sfnt) at offset 0x642B 19072 bytes

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