Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2d074b49e097c52…

MALICIOUS

PDF

34.7 KB Created: 2021-06-17 17:27:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 43d448157bf3308c64cd4154b0a1fa39 SHA-1: 588652b76c0b68b654be410bd743662d93d0fefc SHA-256: b2d074b49e097c527fb0d4631d7c7a587b7a5ddd71f22ea3071c384731e50690
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs and a document body that promotes free downloads for game hacks and cheats, such as 'Synapse X Download Free Roblox'. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a tactic to distribute malicious content or redirect users to phishing sites. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/synapse-x-download-free-roblox-game-hack PDF link annotation
    • http://elib-s2.ubl.ac.id/repository/free-name-change-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/tiktok-free-fans_GM835599320.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/best-roblox-games-with-free-beat-box_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-minecraft-bedrock-server-hosting_GM479516143.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/robux-hack-windows-7_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-cheat-in-lumber-tycoon-2-roblox-axes_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-rixty-codes-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-hack-executor-download_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-shirt-copies-on-roblox_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-get-bc-for-free-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-roblox-object-en-vedette_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-minecraft-accounts-2021_GM479516143.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/hack-de-allah-akabar-roblox-download_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/map-for-free-robux_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-hack_GM431946152.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
font_00_sfnt_off00002f2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F2D 22468 bytes
SHA-256: e762c5022f65dfbde15997a10abcdda4b0177421a3d1841c2dfae08145bb8ef6
font_01_sfnt_off0000618e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x618E 19328 bytes
SHA-256: 126e8f75f26658a2bb7ec4b0bc676e2ec0e87157e78d46d6efb822cefe0f6d8f

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