Malicious PDF — malware analysis report

Static analysis result for SHA-256 28170a62c08081b9…

MALICIOUS

PDF

43.4 KB Created: 2021-05-11 01:03:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 28b5e96aacd687a32bbed90d2ee1fd4d SHA-1: 69e4bd2ff2c89168e93b13772649e9c46d8493a8 SHA-256: 28170a62c08081b9e987e32d985689c2360dcbd74941d55a0fbae7e0a48db827
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many of which are SEO-optimized and point to pages promising free Robux or game hacks. The ML classifier strongly indicated maliciousness, and the presence of a direct link to a potentially malicious URL reinforces this. The document's purpose appears to be to drive traffic to these lure sites, which likely host further malicious content or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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.xyz/app/431946152/free-robux-meme-game-hack
    • http://library.unissula.ac.id/fk//repository/but-link-says-free-robux_GM431946152.pdf
    • http://library.unissula.ac.id/fk/repository/roblox-fun-com-free-robux_GM431946152.pdf
    • http://library.unissula.ac.id/fe/repository/whats-robux_GM431946152.pdf
    • http://library.unissula.ac.id/fe/repository/coin-master-game-free-download_GM406889139.pdf
    • http://library.unissula.ac.id/fk/repository/coin-master-time-speed-hack_GM406889139.pdf
    • http://library.unissula.ac.id/fk//repository/free-coin-master-spins-and-coins_GM406889139.pdf
    • http://library.unissula.ac.id/fe/repository/how-do-you-get-free-roebucks_GM431946152.pdf
    • http://library.unissula.ac.id/fk/repository/roblox-studio-free-download_GM431946152.pdf
    • http://library.unissula.ac.id/fk//repository/how-to-get-free-robux-inspect_GM431946152.pdf
    • http://library.unissula.ac.id/fe/repository/free-robux-co_GM431946152.pdf
    • http://library.unissula.ac.id/fe/repository/free-roblox-toy-codes-2021_GM431946152.pdf
    • http://library.unissula.ac.id/fk//repository/optifine-pe_GM479516143.pdf
    • http://library.unissula.ac.id/fk/repository/free-robux-link_GM431946152.pdf
    • http://library.unissula.ac.id/fe/repository/coin-master-free-coins-app_GM406889139.pdf
    • http://library.unissula.ac.id/fk/repository/update-coin-master-free-spins_GM406889139.pdf
    • http://library.unissula.ac.id/fe/repository/minecraft-bedrock-download-pc-free_GM479516143.pdf
    • http://library.unissula.ac.id/fe/repository/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdf
    • http://library.unissula.ac.id/fk//repository/coin-master-hack-apk-2021_GM406889139.pdf
    • http://library.unissula.ac.id/fe/repository/hacks-to-get-free-robux_GM431946152.pdf
    • http://library.unissula.ac.id/fk//repository/coin-master-hack-spin_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004956.bin
6ab34b11a1b9aac2f2826492cab8e3c083ad8c9be9a7a559a00ddf688e32d1dc		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4956 26824 bytes
font_01_sfnt_off0000871e.bin
3e6db3c9d7b90636a2057efa50536683edf8623f57b31e837fe721178fdf9957		 pdf-font-stream PDF embedded font (sfnt) at offset 0x871E 18468 bytes

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