Malicious PDF — malware analysis report

Static analysis result for SHA-256 c152203a3f4e9fd3…

MALICIOUS

PDF

42.4 KB Created: 2021-04-27 12:23:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 1a74953aa1e510b1720bbe87ce96d5bc SHA-1: bc78284abc7d95cd4fc8b39b499ed3281479bc86 SHA-256: c152203a3f4e9fd3436114c2833dc8fa2beeae13577ad8d341bd176f4abf31d9
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures related to obtaining free items in the game Roblox, including a prominent call-to-action button and embedded URLs. The ML classifier strongly flagged this PDF as malicious, and the presence of multiple external URLs suggests a phishing or malware distribution attempt. The document's content and heuristics indicate it's designed to trick users into visiting malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 4

  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/how-to-get-catalog-items-for-free-roblox-no-hack-game-hack PDF link annotation
    • http://www.saburai.ac.id/elibrary//repository/free-robux-gift-cards-2021.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/free-stuff-in-roblox-catalog-2021.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/como-tener-robux-gratis-hack.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-redeem-toy-codes-free.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/free-robux-no-buying-armanda.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/free-roblox-player-download.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-hack-de-dragon-ball-rage.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/how-to-get-free-robux-legit-with-proof.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/free-robux-no-hacking-2021.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/free-robux-november.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_off00004450.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4450 26776 bytes
SHA-256: 083f54ebd3a423bdb8967e1b590d167fe2b8712566c1d4e9a005d0f278d379f7
font_01_sfnt_off00008144.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8144 19160 bytes
SHA-256: 1259075c0f79a80988745f2a61cd63cabca6461be0ffcf39abc18b19750e938a

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