Malicious PDF — malware analysis report

Static analysis result for SHA-256 70898c5d673d5e37…

MALICIOUS

PDF

35.1 KB Created: 2021-07-06 03:06:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d99b6469f50a077f7088edd68c9bccd1 SHA-1: bd5a7212f1b91a600d8b533816dd67fabf28bcf2 SHA-256: 70898c5d673d5e37e7cd12a270a0642059f69aee6e9a08eaf551dcc563fed274
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many of which are structured as SEO-optimized links pointing to pages promising game hacks and free currency. The document body and heuristics indicate a lure for users to click these links, likely leading to malicious websites or further malware downloads. The ML classifier strongly supports the malicious nature of this PDF.

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/406889139/coin-master-free-spins-link-2021-game-hack
    • http://sdn4-wates.sch.id/akasia/repository/robux-hack-inspect-2021_GM431946152.pdf
    • http://sdn4-wates.sch.id/akasia/repository/coin-master-free-spin-link-today-2021_GM406889139.pdf
    • http://sdn4-wates.sch.id/akasia/repository/free-spins-coin-master-hack_GM406889139.pdf
    • http://sdn4-wates.sch.id/akasia/repository/haow-to-hack-robux-no-bc_GM431946152.pdf
    • http://sdn4-wates.sch.id/akasia/repository/free-star-codes-roblox_GM431946152.pdf
    • http://sdn4-wates.sch.id/akasia/repository/how-to-make-a-3d-hack-shirt-on-roblox_GM431946152.pdf
    • http://sdn4-wates.sch.id/akasia/repository/how-to-get-halo-for-free-roblox_GM431946152.pdf
    • http://sdn4-wates.sch.id/akasia/repository/how-to-use-aimbot-hacks-in-roblox-hoops_GM431946152.pdf
    • http://sdn4-wates.sch.id/akasia/repository/coinmaster-rewards_GM406889139.pdf
    • http://sdn4-wates.sch.id/akasia/repository/free-robux-codes-2021-generator_GM431946152.pdf
    • http://sdn4-wates.sch.id/akasia/repository/free-robux-no-verification-2021_GM431946152.pdf
    • http://sdn4-wates.sch.id/akasia/repository/free-roblox-codes-2021-no-download_GM431946152.pdf
    • http://sdn4-wates.sch.id/akasia/repository/free-robux-games-that-actually-work-2021_GM431946152.pdf
    • http://sdn4-wates.sch.id/akasia/repository/roblox-champl-dll-hack_GM431946152.pdf
    • http://sdn4-wates.sch.id/akasia/repository/hack-configuration-roblox_GM431946152.pdf
    • http://sdn4-wates.sch.id/akasia/repository/free-robux-no-survey-or-human-verification_GM431946152.pdf
    • http://sdn4-wates.sch.id/akasia/repository/rare-free-links-to-coin-master_GM406889139.pdf
    • http://sdn4-wates.sch.id/akasia/repository/how-to-get-free-robux-on-mobile-2021_GM431946152.pdf
    • http://sdn4-wates.sch.id/akasia/repository/get-minecraft-for-free_GM479516143.pdf
    • http://sdn4-wates.sch.id/akasia/repository/coin-master-free-spins-facebook_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003232.bin
92911e350563a7919bd060ce37f426828f47b0d5ccf159f488e997aed89a4f01		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3232 22636 bytes
font_01_sfnt_off00006501.bin
785b8830476a1dba2603225cf55ebb3d3433825858fb25e5612ad86a59b30773		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6501 18748 bytes

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