Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d90ce6521f649b8…

MALICIOUS

PDF

45.6 KB Created: 2021-05-13 19:08:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a86e7c9bf7a7ad4ac332f4ca9eed7327 SHA-1: 09abf372e9c5489ce377fbad0eaaeb8172c1673c SHA-256: 2d90ce6521f649b829839a99a3202582a5c282ad66985d77cd190d5bdc369a07
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains a large number of external links, many of which are related to game hacks and cheats. The ML classifier also flagged this PDF as malicious. The primary attack pattern involves luring users to click these links, which likely lead to malicious websites or downloads designed to compromise the user's system. No scripts were extracted, but the extensive link farm suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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.xyz/app/406889139/how-to-really-hack-coin-master-game-hack
    • https://www.iseas.com/uploaded_files/userfiles/files/roblox-hacked-version-download_GM431946152.pdf
    • https://www.iseas.com/uploaded_files/userfiles/files/free-roblox-codes_GM431946152.pdf
    • https://www.iseas.com/uploaded_files/userfiles/files/free-robux-ad_GM431946152.pdf
    • https://www.iseas.com/uploaded_files/userfiles/files/can-i-have-robux_GM431946152.pdf
    • https://www.iseas.com/uploaded_files/userfiles/files/free-money-links-coin-master_GM406889139.pdf
    • https://www.iseas.com/uploaded_files/userfiles/files/coin-master-free-spins-may-11-2021_GM406889139.pdf
    • https://www.iseas.com/uploaded_files/userfiles/files/coin-master-free-spins-a2z-help_GM406889139.pdf
    • https://www.iseas.com/uploaded_files/userfiles/files/archery-master-3d-hack-unlimited-coins-cheats_GM406889139.pdf
    • https://www.iseas.com/uploaded_files/userfiles/files/www-coin-master-hack-com_GM406889139.pdf
    • https://www.iseas.com/uploaded_files/userfiles/files/get-free-food-in-coin-master_GM406889139.pdf
    • https://www.iseas.com/uploaded_files/userfiles/files/how-to-get-free-robux-no-verification-2021_GM431946152.pdf
    • https://www.iseas.com/uploaded_files/userfiles/files/minecraft-hax-download-no-virus_GM479516143.pdf
    • https://www.iseas.com/uploaded_files/userfiles/files/best-way-to-get-free-robux_GM431946152.pdf
    • https://www.iseas.com/uploaded_files/userfiles/files/is-minecraft-java-free_GM479516143.pdf
    • https://www.iseas.com/uploaded_files/userfiles/files/how-to-get-free-robux-hack-2021_GM431946152.pdf
    • https://www.iseas.com/uploaded_files/userfiles/files/how-to-make-a-server-in-minecraft-java-for-free_GM479516143.pdf
    • https://www.iseas.com/uploaded_files/userfiles/files/coin-master-free-spin-and-coin-links_GM406889139.pdf
    • https://www.iseas.com/uploaded_files/userfiles/files/wwwcoin-master-free-spincom_GM406889139.pdf
    • https://www.iseas.com/uploaded_files/userfiles/files/coin-master-hack-unlimited-spins-apk_GM406889139.pdf
    • https://www.iseas.com/uploaded_files/userfiles/files/can-you-actually-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_003_off00004d08.bin
d8d19173f07ef6b314a5b68c12055c8dbb1416a173e0e360e4409de1761eeeb8		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D08 25080 bytes
font_01_sfnt_off0000866d.bin
3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676		 pdf-font-stream PDF embedded font (sfnt) at offset 0x866D 2840 bytes
font_02_sfnt_off0000901f.bin
43fabb79dcfa9a2667d849210538d71144c24d5b20537b6e3355d373d42557b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x901F 18132 bytes

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