Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dda9a5d87404797…

MALICIOUS

PDF

48.3 KB Created: 2021-04-25 05:04:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: e7d378f68a5cd6f49c95c5699472d3b8 SHA-1: 05a292fb5ad4d860af041496908daaa5fc5ee930 SHA-256: 8dda9a5d8740479770880f12f345730a3b644bad8ae69064322dac9a0bcd8e8a
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to known malicious redirector infrastructure, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded URLs suggest a lure related to 'Robux hacks' for the game Roblox, aiming to trick users into clicking the malicious link. The ML classifier also flagged this PDF with high confidence, reinforcing the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/hack In PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/how-to-get-girl-hair-on-roblox-for-free.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/javascript-robux-hack-pastebin.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/free-account-in-roblox-2021.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/download-roblox-pc-windows-10-free.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/free-bc-roblox-2021.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/how-to-get-free-stuff-in-adopt-me-roblox.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/no-survey-anti-bots-allowed-robux-hacker.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/how-to-hack-robux-with-cheat-engine.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/criminals-vs-swat-roblox-hack-script.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/hack-roblox-hydra.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004316.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4316 39796 bytes
SHA-256: 4f8c68664287c12d6c869a018e681521939c2a03ca95ca3538ec6ed135c328e2
font_01_sfnt_off00009875.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9875 19260 bytes
SHA-256: f85f4011e7cf38d69387d6ffae3087ae7b68cd035d6abd8779c6f78a9e13410e

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