Malicious PDF — malware analysis report

Static analysis result for SHA-256 374341acff7d2261…

MALICIOUS

PDF

36.1 KB Created: 2021-06-18 04:14:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 8947471edd750bcb33c7743d0a233578 SHA-1: 27cd83ff16e89f53513a82cb95a6a254722014ed SHA-256: 374341acff7d226198f5a28e8e98ee413c6ecb178bed6dc1470f48755060c903
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs that are part of a link farm, designed to direct users to sites offering game hacks and generators. The ML classifier strongly flagged this PDF as malicious, and the presence of a 'download button' heuristic further supports a malicious intent to trick users into downloading further content. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to facilitate the download of malicious payloads.

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/rainbow-path-roblox-hack-game-hack PDF link annotation
    • http://repository.unla.ac.id/repository/coin-master-free-spins-generator-no-verification_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/easy-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/minecraft-maps-pe-free-download_GM479516143.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/fast-robux-online_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/get-free-lives-on-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/easy-robux-generator_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/minecraft-free-download-android-apk_GM479516143.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-do-you-hack-peoples-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-hack-roblox-more-than-20-letters-in-username_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-money-generator-cbr-roblox_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/http-roblox-mobile-hacks-4-free-com_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-get-free-hair-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/tiktok-free-zoom_GM835599320.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/make-free-shirts-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off00003479.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3479 22688 bytes
SHA-256: eca5ca5ae7eb4cfc6c6895241acdecadedb8d5e31a00da1be8e42773c48076b6
font_01_sfnt_off00006729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6729 19364 bytes
SHA-256: cdfd5b16d61d271250a41c65447722fc84254589196234eee43a089e8a0d2ba5

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