Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5a57759a6b827bd…

MALICIOUS

PDF

35.4 KB Created: 2021-07-03 11:49:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 44ae97a92584cc957ed09b8c0ffaf86b SHA-1: f340f3e8800091cd044afb64b6f75024496bb9e5 SHA-256: e5a57759a6b827bd8cbdc18f674e7336f80533fa24ef09853c1deaf1ac4d6d44
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which are SEO-optimized slugs pointing to game-related hacks and freebies. The primary URL, http://netcdn.tw/app/406889139/haktuts-coin-master-free-spins-2021-game-hack, suggests a lure for game cheats. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent, possibly to download a second-stage payload or phish for user credentials.

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/haktuts-coin-master-free-spins-2021-game-hack
    • http://poltekkesbanten.ac.id/e-lib/repository/how-to-hack-youre-hacked-account-back-on-roblox_GM431946152.pdf
    • http://poltekkesbanten.ac.id/e-lib/repository/free-robux-without-downloading-apps-on-ipad_GM431946152.pdf
    • http://poltekkesbanten.ac.id/e-lib/repository/coin-master-free-spins-twitter_GM406889139.pdf
    • http://poltekkesbanten.ac.id/e-lib/repository/free-vip-server-roblox-jailbreak_GM431946152.pdf
    • http://poltekkesbanten.ac.id/e-lib/repository/synapse-hack-download-roblox_GM431946152.pdf
    • http://poltekkesbanten.ac.id/e-lib/repository/free-robux-o-logo_GM431946152.pdf
    • http://poltekkesbanten.ac.id/e-lib/repository/roblox-free-no-sign-up-no-download_GM431946152.pdf
    • http://poltekkesbanten.ac.id/e-lib/repository/minecraft_GM479516143.pdf
    • http://poltekkesbanten.ac.id/e-lib/repository/roblox-gewicht-heben-simulator-3-hack_GM431946152.pdf
    • http://poltekkesbanten.ac.id/e-lib/repository/how-to-get-free-robux-without-downloading-apps_GM431946152.pdf
    • http://poltekkesbanten.ac.id/e-lib/repository/best-free-minecraft-servers_GM479516143.pdf
    • http://poltekkesbanten.ac.id/e-lib/repository/how-o-use-cheat-engine-in-roblox-tycoon_GM431946152.pdf
    • http://poltekkesbanten.ac.id/e-lib/repository/robux-free-no-human-verification-2021_GM431946152.pdf
    • http://poltekkesbanten.ac.id/e-lib/repository/roblox-free-vip-t-shirt_GM431946152.pdf
    • http://poltekkesbanten.ac.id/e-lib/repository/free-robux-earner_GM431946152.pdf
    • http://poltekkesbanten.ac.id/e-lib/repository/coin-master-free-spins-link-no-verification-code_GM406889139.pdf
    • http://poltekkesbanten.ac.id/e-lib/repository/free-roblox-shirt-templates-free-shipping_GM431946152.pdf
    • http://poltekkesbanten.ac.id/e-lib/repository/is-roblox-studio-free_GM431946152.pdf
    • http://poltekkesbanten.ac.id/e-lib/repository/free-minecraft-skins-ps4_GM479516143.pdf
    • http://poltekkesbanten.ac.id/e-lib/repository/how-to-get-free-robux-on-phone_GM431946152.pdf
    • https://www.urcouponsdeal.com/2019/03/coin-
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003346.bin
50cf8bff58139f92da42cc82caf7213fcd22e325813444c33d1a0b53163f8f13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3346 22724 bytes
font_01_sfnt_off00006603.bin
419a54345942d61df1c2508925993529a2deda544c7f32f326dbec5b819008ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6603 18884 bytes

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