Malicious PDF — malware analysis report

Static analysis result for SHA-256 2743f07fff2b6782…

MALICIOUS

PDF

35.4 KB Created: 2021-07-05 09:10:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5692a6b6fdb62e6f41dadcb7de37e91f SHA-1: 6aa4877c658bd8acec4645e21ec850c7e4b94bd2 SHA-256: 2743f07fff2b6782b64eda7e0b5b4035c5b8d5f090619f00685a3b2301dcfc05
102 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded URLs, forming a link farm that directs users to sites offering game hacks and cheats. The primary URL, http://netcdn.tw/app/479516143/wurst-download-game-hack, suggests a download lure for potentially malicious software. The ML classifier and PDF SEO link farm heuristic strongly indicate malicious intent.

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/wurst-download-game-hack
    • http://library.unissula.ac.id/fk/repository/all-free-shirt-in-roblox_GM431946152.pdf
    • http://library.unissula.ac.id/fk/repository/how-to-hack-roblox-no-download_GM431946152.pdf
    • http://library.unissula.ac.id/fk/repository/free-coins-coin-master-iphone_GM406889139.pdf
    • http://library.unissula.ac.id/fe/repository/oprewards-com-login_GM431946152.pdf
    • http://library.unissula.ac.id/fk/repository/roblox-ghost-hack-cheat-engine-2021_GM431946152.pdf
    • http://library.unissula.ac.id/fk//repository/coin-master-free-spins-link-2021-today_GM406889139.pdf
    • http://library.unissula.ac.id/fk/repository/roblox-executor-free_GM431946152.pdf
    • http://library.unissula.ac.id/fe/repository/how-to-install-minecraft-for-free_GM479516143.pdf
    • http://library.unissula.ac.id/fk/repository/real-robux-generator_GM431946152.pdf
    • http://library.unissula.ac.id/fk//repository/free-minecraft-accounts-reddit_GM479516143.pdf
    • http://library.unissula.ac.id/fe/repository/hack-xp-net-generators-coin-master_GM406889139.pdf
    • http://library.unissula.ac.id/fk/repository/how-to-get-a-free-dominus-in-roblox-mobile_GM431946152.pdf
    • http://library.unissula.ac.id/fk//repository/how-do-i-get-tiktok-for-free_GM835599320.pdf
    • http://library.unissula.ac.id/fk/repository/free-robux-gift-card-codes-2021-july_GM431946152.pdf
    • http://library.unissula.ac.id/fk/repository/regex-roblox-jailbreak-hack_GM431946152.pdf
    • http://library.unissula.ac.id/fe/repository/coin-master-hack-android-root_GM406889139.pdf
    • http://library.unissula.ac.id/fk/repository/roblox-plates-of-fate-hack-coal_GM431946152.pdf
    • http://library.unissula.ac.id/fe/repository/coin-master-daily-bonus_GM406889139.pdf
    • http://library.unissula.ac.id/fk/repository/coin-master-hack-cheat-generator-coins-and-spins-unlimited_GM406889139.pdf
    • http://library.unissula.ac.id/fk//repository/free-coin-master-spins-and-coins_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000033be.bin
4ff855dd1f05df7535148ea9e9665819f70548446cbce542c1a4ef2dd556e400
pdf-font-stream PDF embedded font (sfnt) at offset 0x33BE 22676 bytes
font_01_sfnt_off00006644.bin
41b057bebeefa6dc0e0c7cd8e7e537373d3987302916cf05e2be674a8495b48b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6644 18796 bytes