Malicious PDF — malware analysis report

Static analysis result for SHA-256 93a15e367cb23dc0…

MALICIOUS

PDF

33.6 KB Created: 2021-07-03 20:52:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: c113b33155a44aa7a31f7b1384aad063 SHA-1: 200c06309cd7191a5b478763f667faae4da51fd3 SHA-256: 93a15e367cb23dc0a70ea076c479687334c4d2a9d6695eff4307a5747947aa4a
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a document body that lures users with promises of free Robux and game hacks. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, and the ML classifier strongly suggests maliciousness. The primary attack pattern involves directing users to potentially malicious websites or download pages disguised as game-related resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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.tw/app/431946152/how-to-get-free-robux-on-roblox-2021-no-hacks-game-hack PDF link annotation
    • http://digilib.unbari.ac.id/repository/minecraft-free-apk-download-016-0_GM479516143.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/freepsy-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-get-the-headless-head-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-roblox-gift-cards-nov-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/is-there-a-hack-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/roblox-hack-app_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/roblox-how-to-get-free-limited-items_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/https-www-roblox-com-free-download_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-mod-apk-2021_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-roblox-hack-apk-download-for-android_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/tower-of-hell-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-robux-limited_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-hack-apk-android-1_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/hack-coin-master-apk-mod_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-get-free-robux-safely_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_off00002b2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B2D 22456 bytes
SHA-256: 2d45f81a52202f6b1b79ec0e6ffe278ab68dcc73e945da2861c3554f2dfcc7e7
font_01_sfnt_off00005d3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D3D 19444 bytes
SHA-256: f0221efac89439c117fbca60c8587d27b6fc9ac4e223ed28efc6bd06d59d3958

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