Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ff8f47e7bdb95d8…

MALICIOUS

PDF

36.7 KB Created: 2021-05-22 00:39:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 11dcae5e901c93e118eddefc2be62f5a SHA-1: aff48589b987d89746dad05a71f96c4bb2cd3ca3 SHA-256: 9ff8f47e7bdb95d8f649c110a4cddc29c1ba7d6e9019c80f564ffcf8cb20fbc9
82 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs pointing to sites offering game hacks and downloads, suggesting a lure for malware. The 'SE_CLICKFIX' heuristic indicates the document likely instructs the user to execute a command, a common social engineering tactic to bypass security measures. While no scripts were directly extracted, the presence of embedded URLs and the 'ML_NYX_PDF_MALICIOUS' flag strongly suggest the document is designed to lead the user to download and execute a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

Heuristics 4

  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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/479516143/minecraft-java-edition-download-free-game-hack
    • https://vireco-online.com/ckfinder/userfiles/files/master-coin-hack-game_GM406889139.pdf
    • https://vireco-online.com/ckfinder/userfiles/files/coin-master-32-android-mod-hack-apk-download_GM406889139.pdf
    • https://vireco-online.com/ckfinder/userfiles/files/roblox-skin-free_GM431946152.pdf
    • https://vireco-online.com/ckfinder/userfiles/files/how-to-get-free-stuff-on-roblox_GM431946152.pdf
    • https://vireco-online.com/ckfinder/userfiles/files/without-pokemon-go-free-incense_GM1094591345.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003562.bin
b89443d164ba333f466c17076fb53f23b0703f3d0713bd316828bfa64828376d		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3562 24804 bytes
font_01_sfnt_off00006d4d.bin
b44bcce2d8515c0d099a66814c088ed689798a3dbc3c1364cf14b7c888151b67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D4D 18572 bytes

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