Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac40c4353282d123…

MALICIOUS

PDF

52.0 KB Created: 2021-06-03 11:22:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 6aa1fdb3b1ebcb4baa526068b1965f0e SHA-1: 13be50bc3a7daaceb691ff3e93687ca3e3fe5623 SHA-256: ac40c4353282d123cbd17c53acba158bb2400bac9f6986ca858ef4d314d39151
102 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, identified as a link farm, pointing to websites offering game cheats and hacks. The ML classifier also flagged this PDF as malicious. The presence of a 'download' button lure further supports the malicious intent of directing users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9657

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/431946152/www-roblox-com-robux-free-game-hack
    • http://lib.akpnbahtera.ac.id/repository/coin-master-free-spins-hack-link_GM406889139.pdf
    • http://lib.akpnbahtera.ac.id/repository/how-to-hack-roblox-accounts_GM431946152.pdf
    • http://lib.akpnbahtera.ac.id/repository/www-roblox-com-free-robux_GM431946152.pdf
    • http://lib.akpnbahtera.ac.id/repository/wurst-115-2_GM479516143.pdf
    • http://lib.akpnbahtera.ac.id/repository/is-there-an-actual-hack-that-work-for-coin-master_GM406889139.pdf
    • http://lib.akpnbahtera.ac.id/repository/coin-master-free-spins-and-coins-group_GM406889139.pdf
    • http://lib.akpnbahtera.ac.id/repository/minecraft-packs-free_GM479516143.pdf
    • http://lib.akpnbahtera.ac.id/repository/is-tiktok-free-to-download-on-iphone_GM835599320.pdf
    • http://lib.akpnbahtera.ac.id/repository/coin-master-hack-tool-no-human-verification_GM406889139.pdf
    • http://lib.akpnbahtera.ac.id/repository/haktuts-coin-master-spins_GM406889139.pdf
    • http://lib.akpnbahtera.ac.id/repository/how-to-earn-robux-fast_GM431946152.pdf
    • http://lib.akpnbahtera.ac.id/repository/free-spins-for-coin-master_GM406889139.pdf
    • http://lib.akpnbahtera.ac.id/repository/como-conseguir-monedas-infinitas-y-tiradas-de-coin-master-hack_GM406889139.pdf
    • http://lib.akpnbahtera.ac.id/repository/free-roblox-dominus_GM431946152.pdf
    • http://lib.akpnbahtera.ac.id/repository/how-to-download-minecraft-for-free-on-android_GM479516143.pdf
    • http://lib.akpnbahtera.ac.id/repository/coin-master-free-spin-27_GM406889139.pdf
    • http://lib.akpnbahtera.ac.id/repository/free-spins-coin-master-app-ios_GM406889139.pdf
    • http://lib.akpnbahtera.ac.id/repository/free-robux-for-free_GM431946152.pdf
    • http://lib.akpnbahtera.ac.id/repository/robux-offers_GM431946152.pdf
    • http://lib.akpnbahtera.ac.id/repository/easiest-coin-master-hack_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000052fc.bin
f195e7a198b78f93e17b85bebd0e49e9b6b50eafbfa936b4c3526dce5b2ffae2		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52FC 26840 bytes
font_01_sfnt_off0000909c.bin
1d0cb1023eaa225682b8e7a2c8df4e4c96545ba7eedaf3d9844e51183e9ca189		 pdf-font-stream PDF embedded font (sfnt) at offset 0x909C 2824 bytes
font_02_sfnt_off00009a44.bin
450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A44 5696 bytes
font_03_sfnt_off0000a756.bin
c91f27fd30ec200e2a0dbd5cc88ad35776bc2371b1b59549651737de5f7a4295		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA756 18708 bytes

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