Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffa299406e7e28ec…

MALICIOUS

PDF

40.6 KB Created: 2021-04-27 01:03:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e7952de8acf42bdd5c1e9a3ce2fc9d84 SHA-1: 6cf1900c3081abe19ee9812e8c2246cd580074c5 SHA-256: ffa299406e7e28ec83f8f79cf75ee1a9c800e9f933dcaa0a587804387364ba5e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains heuristics indicating it is malicious and attempts to lure the user into installing a browser extension or update. It also embeds external URIs, including one pointing to a potential exploit or malware download. While no scripts were directly extracted, the presence of embedded URIs and the ML classifier's high confidence suggest a malicious payload delivery mechanism, likely initiated by user interaction with the fake download button.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 4

  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/fps-free-roblox-game-hack PDF link annotation
    • https://library.itn.ac.id/perpusitn/repository/rocitizens-roblox-cheat-codes-2021.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/ninja-animation-roblox-free.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/cheat-kart-roblox.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/https-wwwfree-robux-at-http-rex-eu5org.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-robuxs-trackid-sp006.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-mobile-money-cheats.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/robux-codes-unused-free-robux.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-to-hack-people-on-roblox-2021.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/como-hackear-y-tener-robux.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/boku-no-roblox-remastered-hack-chose-quirks.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000041ca.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x41CA 26336 bytes
SHA-256: 6d98a492d9903a943203d4d37894964c8565c03896598b55c17be8aae88e1787
font_01_sfnt_off00007da0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DA0 18124 bytes
SHA-256: 16dbd321ae16cfbaf956c64205048131039f904929b24b3f8718b51d6b8b9d6d

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