Malicious PDF — malware analysis report

Static analysis result for SHA-256 1580e84bf43244f7…

MALICIOUS

PDF

50.3 KB Created: 2021-06-09 01:05:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: cca1b88cb61d20092dcb648906abf389 SHA-1: 1980d1b30ffca798238ab9a16f6e94f9539cd8a4 SHA-256: 1580e84bf43244f78da3e515d52cb919cfea9cb0cf2961a26224f357e9b83c95
110 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of external links, many of which are SEO-optimized and point to sites offering game hacks and free items. The ML classifier strongly indicated maliciousness. The document's content and structure suggest it's designed to drive traffic to these potentially malicious URLs, which could host further malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.tw/app/431946152/free-accessory-nike-hoodie-in-roblox-game-hack
    • https://kab-bangli.kpu.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-pro-gamers_GM406889139.pdf
    • https://kab-bangli.kpu.go.id/new/public/ckfinder/userfiles/files/how-do-you-get-free-food-in-coin-master_GM406889139.pdf
    • https://kab-bangli.kpu.go.id/new/public/ckfinder/userfiles/files/get-free-robux-no-verification_GM431946152.pdf
    • https://kab-bangli.kpu.go.id/new/public/ckfinder/userfiles/files/free-coin-master-spins-blog_GM406889139.pdf
    • https://kab-bangli.kpu.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdf
    • https://kab-bangli.kpu.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdf
    • https://kab-bangli.kpu.go.id/new/public/ckfinder/userfiles/files/roblox-fun-com-robux_GM431946152.pdf
    • https://kab-bangli.kpu.go.id/new/public/ckfinder/userfiles/files/is-minecraft-free-on-xbox-one_GM479516143.pdf
    • https://kab-bangli.kpu.go.id/new/public/ckfinder/userfiles/files/free-vpn-for-minecraft_GM479516143.pdf
    • https://kab-bangli.kpu.go.id/new/public/ckfinder/userfiles/files/free-robux-for-kids_GM431946152.pdf
    • https://kab-bangli.kpu.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-cheat_GM406889139.pdf
    • https://kab-bangli.kpu.go.id/new/public/ckfinder/userfiles/files/op-rewards-free-robux_GM431946152.pdf
    • https://kab-bangli.kpu.go.id/new/public/ckfinder/userfiles/files/minecraft-116-1-download_GM479516143.pdf
    • https://kab-bangli.kpu.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-without-human-verification_GM431946152.pdf
    • https://kab-bangli.kpu.go.id/new/public/ckfinder/userfiles/files/roblox-free-robux-codes_GM431946152.pdf
    • https://kab-bangli.kpu.go.id/new/public/ckfinder/userfiles/files/hackear-coin-master-android_GM406889139.pdf
    • https://kab-bangli.kpu.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-2021_GM431946152.pdf
    • https://kab-bangli.kpu.go.id/new/public/ckfinder/userfiles/files/roblox-adopt-me-hack_GM431946152.pdf
    • https://kab-bangli.kpu.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-2021-ios_GM406889139.pdf
    • https://kab-bangli.kpu.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-coins-in-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000519f.bin
908d7e5825e0d47412be18c75c9b959915560a82f5b0b2f460032d88b565e6ae		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x519F 28520 bytes
font_01_sfnt_off0000940e.bin
450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139		 pdf-font-stream PDF embedded font (sfnt) at offset 0x940E 5696 bytes
font_02_sfnt_off0000a11f.bin
bef87d2bab769ff317078c361e5ad5aaadd9da99038bc671f10f76bab7094f70		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA11F 18592 bytes

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