Malicious PDF — malware analysis report

Static analysis result for SHA-256 165ab873aa352ba5…

MALICIOUS

PDF

34.1 KB Created: 2021-07-05 22:20:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ee447e04b949bccce901f34061667566 SHA-1: d9f93c5276d7f8aebf3551c72e3b8ef8e455682f SHA-256: 165ab873aa352ba575a45c044d17e6e25efc7e8507913b0340e98846755baec8
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, identified as a link farm, that direct users to websites offering game hacks and cheats. The primary URL, http://netcdn.tw/app/406889139/coin-master-card-collection-hack-apk-game-hack, is likely part of a campaign to distribute malware disguised as game cheats. 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-card-collection-hack-apk-game-hack
    • http://mansatupati.my.id/__statics/gudangsoal/files/roblox-inappropriate-games_GM431946152.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/free-robux-sites-that-work_GM431946152.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/how-to-get-a-free-epic-face-on-roblox_GM431946152.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/free-coin-master-hack-no-verification_GM406889139.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/free-roblox-money_GM431946152.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/sites-for-free-spins-for-coin-master_GM406889139.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/roblox-easy-cheat-engine-hacks_GM431946152.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/how-to-get-free-robux-in-2021_GM431946152.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/minecraft-free-ios-2021_GM479516143.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/free-gold-cards-for-coin-master_GM406889139.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/cool-free-minecraft-skins_GM479516143.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/wahoogaming-co-free-robux_GM431946152.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/hacks-to-get-free-robux_GM431946152.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/free-mods-for-minecraft-pe_GM479516143.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/coin-master-free-mighty-lion-card_GM406889139.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/how-to-get-tiktok-famous-free_GM835599320.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/how-to-get-to-village-3-in-coin-master_GM406889139.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/coin-master-hack-version-2021-free-download_GM406889139.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/coin-master-daily-rewards_GM406889139.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/free-robux-no-anti-bot-verification_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000303c.bin
bfcf04ceec46cf4e1cc50dd5e6b6cffd81963b22fc0ba09908c6896d940b2b40		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x303C 22420 bytes
font_01_sfnt_off000061f6.bin
fbaa9a7aa99ed65dc179949451f9d180593252eeb381fe8625a198a51d214ab5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61F6 18428 bytes

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