Malicious PDF — malware analysis report

Static analysis result for SHA-256 32b721e95a35b160…

MALICIOUS

PDF

34.5 KB Created: 2021-06-20 06:32:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 4a0abfd0b7647af3add3baaf5900573c SHA-1: acca97953946eef6daa8e9e670f421d2fbb18908 SHA-256: 32b721e95a35b160f4ba6c761792b144b59c2050700fff130dc6efbc1dc3ec05
102 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded URLs, many of which are SEO-optimized links pointing to pages promising free Robux or game hacks. The ML classifier strongly flagged this PDF as malicious, and the presence of a "download button" heuristic suggests a deceptive user interface. The document likely serves as a lure to direct users to malicious websites that may host further malware or phishing content.

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/roblox-games-202120213-free-robux-roblox-game-game-hack PDF link annotation
    • http://pustaka.fhuk.unand.ac.id/repository/how-to-get-robux-for-free-that-actually-works_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/how-to-hack-roblox-with-just-a-site_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/how-to-make-all-items-in-roblox-free_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/how-to-hack-level-on-roblox-paintball_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/t-shirt-template-roblox-free-shipping_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/magitan-roblox-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/egg-farm-simulator-roblox-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/roblox-assasin-hack-script-2021-unpacthed_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/free-robux-information_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/het-free-robux-website_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/how-to-hack-gamepasses-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/free-robux-by-watching-videos-and-no-surveys-or-downloads_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/how-to-get-free-robux-for-robloxcom_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/linkmon99-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/roblox-hack-roghoul_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/free-robux-games_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/jhow-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/how-to-hack-on-roblox-account-theft_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_off0000308c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x308C 21624 bytes
SHA-256: 39aea5ee2a08387c94076b85af71298351b1e9407dfd2ec1abdf21866a4f43ae
font_01_sfnt_off00006000.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6000 19628 bytes
SHA-256: 20eb4d4a82808baec1f1ec6615b8d06e07de8bedf7eb5be99427ccf4355f27b8

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