Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7e70020a3561dd4…

MALICIOUS

PDF

47.7 KB Created: 2021-06-14 00:50:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 83d2a81cd4812851d4cb5b9073b0ac5c SHA-1: f4bc20f4d373ee18527d99ae58fa84c7f41e081e SHA-256: c7e70020a3561dd40c037d826c092215fe0e25ced64f64bdd5acbcbf98466486
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are structured as SEO-optimized PDF files related to game hacking and free in-game currency. The presence of a download button lure and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content or downloads. While no scripts were explicitly extracted, the structure suggests a phishing or content-luring attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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.co/app/431946152/how-to-hack-roblox-on-ios-game-hack
    • https://morishita-tc.com.tw/image/data/files/how-to-get-free-robux-for-kids_GM431946152.pdf
    • https://morishita-tc.com.tw/image/data/files/how-to-escape-the-labyrinth-roblox-hack_GM431946152.pdf
    • https://morishita-tc.com.tw/image/data/files/coin-master-hack-app-android_GM406889139.pdf
    • https://morishita-tc.com.tw/image/data/files/without-pokemon-go-free-incense_GM1094591345.pdf
    • https://morishita-tc.com.tw/image/data/files/minecraft-images-free_GM479516143.pdf
    • https://morishita-tc.com.tw/image/data/files/free-spins-coins-coin-master_GM406889139.pdf
    • https://morishita-tc.com.tw/image/data/files/earn-roblox_GM431946152.pdf
    • https://morishita-tc.com.tw/image/data/files/can-you-actually-get-free-robux_GM431946152.pdf
    • https://morishita-tc.com.tw/image/data/files/how-to-hack-on-roblox-jail-breaker_GM431946152.pdf
    • https://morishita-tc.com.tw/image/data/files/coins-master_GM406889139.pdf
    • https://morishita-tc.com.tw/image/data/files/withdraw-robux_GM431946152.pdf
    • https://morishita-tc.com.tw/image/data/files/unlimited-robux_GM431946152.pdf
    • https://morishita-tc.com.tw/image/data/files/how-to-hack-someones-roblox-account-2021_GM431946152.pdf
    • https://morishita-tc.com.tw/image/data/files/coin-master-free-generator_GM406889139.pdf
    • https://morishita-tc.com.tw/image/data/files/get-coin-master-free-spin_GM406889139.pdf
    • https://morishita-tc.com.tw/image/data/files/how-to-get-free-robux-cheat-engine_GM431946152.pdf
    • https://morishita-tc.com.tw/image/data/files/links-to-get-free-spins-on-coin-master_GM406889139.pdf
    • https://morishita-tc.com.tw/image/data/files/robux-free-co_GM431946152.pdf
    • https://morishita-tc.com.tw/image/data/files/coin-master-free-daily-spins_GM406889139.pdf
    • https://morishita-tc.com.tw/image/data/files/free-spins-coin-master-unlimited_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000049be.bin
a5383071ba695fad9d788ebb7741543e964dfea8d6d26eaa0bff4432369016b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49BE 28836 bytes
font_01_sfnt_off00008b51.bin
8e24205afdd13dcdea98f8150ef77dee4030e0e50a7c748783d1b4598e034a20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B51 3464 bytes
font_02_sfnt_off00009787.bin
8918aa56c6a934d4e067a17d98ddbd95f43fd0bbb470ad65cf96303587a997eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9787 18344 bytes

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