Malicious PDF — malware analysis report

Static analysis result for SHA-256 601b5185e7988e88…

MALICIOUS

PDF

34.3 KB Created: 2021-07-06 01:35:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: efef509b644c7470d293868e68c5e532 SHA-1: 99f262273c0a85c8f24ac2bd52f21d36db84996f SHA-256: 601b5185e7988e880bc1c69e3afaaa66f38100ef3a4270b5acc83ab949c164f1
102 Risk Score

Malware Insights

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

The PDF document contains numerous links to external resources, primarily promoting game cheats and modifications for titles like Coin Master and Roblox. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of these links, suggesting a coordinated effort to direct users to potentially malicious download sites. The presence of a direct download URL and the 'SE_DOWNLOAD_BUTTON' heuristic further support the conclusion that the document's primary purpose is to trick users into downloading and executing untrusted applications.

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-mod-apk-game-hack
    • http://www.library.umbjm.ac.id/repository/free-spins-coin-master-links-app_GM406889139.pdf
    • http://www.library.umbjm.ac.id/repository/moon-static-coin-master-generator-hacks-free_GM406889139.pdf
    • http://www.library.umbjm.ac.id/repository/free-robux-codes-not-used_GM431946152.pdf
    • http://www.library.umbjm.ac.id/repository/free-spin-link-for-coin-master-game_GM406889139.pdf
    • http://www.library.umbjm.ac.id/repository/how-do-i-change-my-username-on-roblox-for-free_GM431946152.pdf
    • http://www.library.umbjm.ac.id/repository/free-spins-on-coin-master-2021-ios_GM406889139.pdf
    • http://www.library.umbjm.ac.id/repository/como-hackear-coin-master-2021_GM406889139.pdf
    • http://www.library.umbjm.ac.id/repository/coin-master-hack-without-verification-code_GM406889139.pdf
    • http://www.library.umbjm.ac.id/repository/roblox-e-free-command_GM431946152.pdf
    • http://www.library.umbjm.ac.id/repository/coin-master-hack-tool-for-pc_GM406889139.pdf
    • http://www.library.umbjm.ac.id/repository/roblox-hack-codes_GM431946152.pdf
    • http://www.library.umbjm.ac.id/repository/minecraft-pe-free_GM479516143.pdf
    • http://www.library.umbjm.ac.id/repository/get-more-robux_GM431946152.pdf
    • http://www.library.umbjm.ac.id/repository/free-skateboarding-game-on-roblox_GM431946152.pdf
    • http://www.library.umbjm.ac.id/repository/mcpe_GM479516143.pdf
    • http://www.library.umbjm.ac.id/repository/minecraft-free-apk_GM479516143.pdf
    • http://www.library.umbjm.ac.id/repository/coin-master-spin-link-today_GM406889139.pdf
    • http://www.library.umbjm.ac.id/repository/pubg-uc-and-skins-smm-panel_GM1330123889.pdf
    • http://www.library.umbjm.ac.id/repository/coin-master-free-coins-link_GM406889139.pdf
    • http://www.library.umbjm.ac.id/repository/free-robux-real-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002f8f.bin
1aa14563f1842b9c7e9703bcfe5266e74e1ccbf475b60346bf0da3c750b8bfbc		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F8F 22824 bytes
font_01_sfnt_off000062f1.bin
8921705bb0180ef928bfc54a8bff441144a325a835df77ae2345570de02769c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62F1 18352 bytes

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