Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa46b72a14b55df3…

MALICIOUS

PDF

36.5 KB Created: 2021-07-05 17:17:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 7233c53a1cd19f5565dc718e5fd2b85e SHA-1: a66a3c27ed449639e53d20b5ace40a884119d37c SHA-256: fa46b72a14b55df37cc34e7b7816324c3a92fe345f71070c7cd8a1b797fae5dd
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links and a document body that promotes free downloads for games and hacks, indicating a lure for users to click and potentially download malware. The heuristic 'PDF_SEO_LINK_FARM' and the ML classifier strongly suggest malicious intent. The presence of multiple external URIs, including one pointing to 'netcdn.tw', further supports the assessment that this document is designed to redirect users to malicious content.

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/479516143/minecraft-xbox-360-free-download-code-game-hack
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/how-to-get-free-robux-codes_GM431946152.pdf
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/legit-coin-master-hack-no-human-verification_GM406889139.pdf
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/roblox-prison-life-cheat-engine-wall-codes_GM431946152.pdf
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/pop-slots-free-vegas-casino-slots-machine-game-coin-master_GM406889139.pdf
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/how-do-you-get-free-stuff-in-roblox-2021_GM431946152.pdf
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/hacks-for-roblox-dead-locked_GM431946152.pdf
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/robux-generator-without-human-verification-2021_GM431946152.pdf
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/minecraft-hacked-client-18_GM479516143.pdf
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/sb-game-hacker-coin-master_GM406889139.pdf
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/best-minecraft-hacks_GM479516143.pdf
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/minecraft-free-ios-2021_GM479516143.pdf
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/free-robux-no-verification-2021-ios_GM431946152.pdf
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/coin-master-card-hack-2021_GM406889139.pdf
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/www-bandicam-com-free-robux_GM431946152.pdf
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/free-black-hole-pack-roblox_GM431946152.pdf
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/roblox-assassin-hack-knives_GM431946152.pdf
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/free-robux-real-2021_GM431946152.pdf
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/rpg-world-cheats-roblox_GM431946152.pdf
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/free-spins-coin-master-october-17-2021_GM406889139.pdf
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/free-robux-app-real_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000365a.bin
759adf1ddbe78d893c3ea8ce1866779d6e63e49cd79fe750f30aad55e62409f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x365A 22316 bytes
font_01_sfnt_off000067a2.bin
43ad2a227d4b371ba67af57b99e7f6a6af10e005219d52730f421fc1693d706f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67A2 19688 bytes

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