Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a901fee63accabd…

MALICIOUS

PDF

33.6 KB Created: 2021-06-19 09:55:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: ddba0275c9771262a10286a4b6f6f307 SHA-1: cc86743cf3f983e04c18c54c3687fb2572819046 SHA-256: 5a901fee63accabd3b69b79124a340e0a255b34f8ea0ab077c6b577c92f92d77
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

This PDF document contains a large number of embedded URLs, many of which are structured as SEO-optimized links to download pages for game exploits and cheats. The ML classifier and the PDF_SEO_LINK_FARM heuristic strongly indicate malicious intent, likely to trick users into downloading malware disguised as game hacks. The presence of a 'Download Now' lure further supports this conclusion.

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-exploit-free-no-viruses-game-hack PDF link annotation
    • http://lib.fisipumt.ac.id/repository/minecraft-education-edition-free-download_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-tablet-cheats_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-games-with-free-boombox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/minecraft-bedrock-free-download-pc_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/minecraft-free-play-no-download_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-roblox-accounts-2021-not-been-used_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-hack-android-root_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-custom-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/robux-gainer_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/1-million-robux-game-pass-free_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/pokemon-go-free-online-download_GM1094591345.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-free-link-app_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-game-free-spin_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/today-free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/hack-mad-city-roblox_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_off00002d0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D0A 22020 bytes
SHA-256: fbf14d28beffe700398e8ededc2b0c32a6c3cd4ec123d8755778ad8c983d3c46
font_01_sfnt_off00005d77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D77 19324 bytes
SHA-256: a8e7a7ab384986e409fee6e265418a6498d7a191c0947233066c594118923e46

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