Malicious PDF — malware analysis report

Static analysis result for SHA-256 8772fc8b0d3f0826…

MALICIOUS

PDF

45.4 KB Created: 2021-06-07 20:18:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b315954347fcd81e8fbe1de9d1cc2c62 SHA-1: a75be0cedb389d1202d5bfbdfbfd39b9f1207c44 SHA-256: 8772fc8b0d3f0826476fbc285d645eddf87498db85b471c7a5be67e064a22f10
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are structured as SEO link farms, suggesting a malicious intent to redirect users. The document body and extracted URLs indicate a lure related to game hacks and free currency, likely to trick users into visiting a compromised site. While no scripts were directly extracted, the PDF structure and heuristic firings strongly suggest it's designed to exploit user interest in obtaining in-game advantages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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 https://netcdn.tw/app/431946152/ich-bin-am-hacken-roblox-name-danny-jesden-game-hack
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/is-it-possible-to-get-free-robux_GM431946152.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/get-free-robux-generator_GM431946152.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/roblox-jailbreak-hack_GM431946152.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/hack-to-get-free-spins-on-coin-master_GM406889139.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/minecraft-bedrock-free-with-java_GM479516143.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/como-hackear-el-juego-coin-master-en-espaol_GM406889139.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/hack-coin-master-1_GM406889139.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/coin-master-free-coins--spins_GM406889139.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/coin-master-mod-version-free-download-34-4_GM406889139.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/coin-master-daily-free-spins-2021_GM406889139.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/how-to-hack-someones-roblox-account_GM431946152.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/coin-master-attack-hack_GM406889139.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/free-coins-coin-master_GM406889139.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/my-roblox-avatar_GM431946152.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/minecraft-xbox-360-free_GM479516143.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/how-to-get-free-roblox_GM431946152.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/coin-master-daily-free-spins_GM406889139.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/free-robux-no-human-verification-and-no-survey_GM431946152.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/can-i-hack-coin-master-with-lucky-patcher_GM406889139.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/hack-game-plus-com-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005023.bin
26c739ae793430a88a307c4de68224975f6128c6dfe1a8dc0c16a6fc9b8645cf		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5023 26440 bytes
font_01_sfnt_off00008ba7.bin
02005a49c3d1a13a0228434f3314e3f3e92ae55ced9b3a72b788181f3cc27606		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BA7 19416 bytes

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