Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfb64bd45ad1fcaa…

MALICIOUS

PDF

35.3 KB Created: 2021-07-04 04:39:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: e1ed86b909c762d75d893cba314394d0 SHA-1: d3c3ce2ddfacf5e0cc7dc97d72375e539b321978 SHA-256: dfb64bd45ad1fcaa42d5900b805f2ab28fc64f9701b689558233159b9d3134c6
102 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are SEO-optimized and point to files related to game hacks and in-game currency. The primary URL http://netcdn.tw/app/406889139/coin-master-computer-hack-game-hack suggests a lure for downloading potentially malicious content. The ML classifier also strongly indicated maliciousness.

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-computer-hack-game-hack
    • https://www.ppid.banglikab.go.id/assets/CKImages/files/free-spins-and-coins-coin-master-link-2021_GM406889139.pdf
    • https://www.ppid.banglikab.go.id/assets/CKImages/files/free-robux-glitch-2021_GM431946152.pdf
    • https://www.ppid.banglikab.go.id/assets/CKImages/files/how-to-get-free-robux-i-39_GM431946152.pdf
    • https://www.ppid.banglikab.go.id/assets/CKImages/files/roblox-hack-how-to-get-free-robux-2021_GM431946152.pdf
    • https://www.ppid.banglikab.go.id/assets/CKImages/files/how-to-get-verified-on-tiktok-for-free-2021_GM835599320.pdf
    • https://www.ppid.banglikab.go.id/assets/CKImages/files/coin-master-free-spins-and-free-coins_GM406889139.pdf
    • https://www.ppid.banglikab.go.id/assets/CKImages/files/roblox-speed-hack-script-v3rmilion_GM431946152.pdf
    • https://www.ppid.banglikab.go.id/assets/CKImages/files/best-free-minecraft-server-hosting-reddit_GM479516143.pdf
    • https://www.ppid.banglikab.go.id/assets/CKImages/files/how-to-get-hacks-on-roblox_GM431946152.pdf
    • https://www.ppid.banglikab.go.id/assets/CKImages/files/coin-master-spin-free_GM406889139.pdf
    • https://www.ppid.banglikab.go.id/assets/CKImages/files/www-roblox-com-free-robux_GM431946152.pdf
    • https://www.ppid.banglikab.go.id/assets/CKImages/files/free-spins-for-coin-master-game_GM406889139.pdf
    • https://www.ppid.banglikab.go.id/assets/CKImages/files/https-free-robux-no-download_GM431946152.pdf
    • https://www.ppid.banglikab.go.id/assets/CKImages/files/free-coins--spins-coin-master_GM406889139.pdf
    • https://www.ppid.banglikab.go.id/assets/CKImages/files/free-robux-hack_GM431946152.pdf
    • https://www.ppid.banglikab.go.id/assets/CKImages/files/how-to-hack-roblox-to-where-you-can-fly_GM431946152.pdf
    • https://www.ppid.banglikab.go.id/assets/CKImages/files/como-hackear-roblox-pokemon-go_GM431946152.pdf
    • https://www.ppid.banglikab.go.id/assets/CKImages/files/haktuts-coin-master-free-spin-link_GM406889139.pdf
    • https://www.ppid.banglikab.go.id/assets/CKImages/files/how-to-hack-the-chat-roblox-no-download_GM431946152.pdf
    • https://www.ppid.banglikab.go.id/assets/CKImages/files/funbloxxyz-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003342.bin
7a78db54424663cd0ea0af4c90703c9ca8aed61cdeecb7a113bf113f75875a91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3342 22960 bytes
font_01_sfnt_off000066b4.bin
497b785ebba59e7ca707536904f047f4e5286b620765a069de1dcc264aa1dd4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66B4 18580 bytes

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