Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1a073fc6cf937aa…

MALICIOUS

PDF

33.8 KB Created: 2021-06-20 05:18:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 2aca979fd983d7c68dbddea9c47f25b2 SHA-1: df9b507eaaf010d07ffb9fc214b0d06133cad8a1 SHA-256: c1a073fc6cf937aadc9885860621d3c535d5188cec3a275679555940b54dd276
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many of which are SEO-optimized to appear as legitimate resources for game-related cheats and currency. The ML classifier strongly indicated maliciousness, and the presence of a large number of external links suggests a link farm or phishing attempt designed to redirect users to potentially harmful 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-free-webcam-overlay-game-hack
    • http://repository.ummy.ac.id/repository/free-roblox-card-codes-unused_GM431946152.pdf
    • http://repository.ummy.ac.id/repository/howe-to-get-free-robux_GM431946152.pdf
    • http://repository.ummy.ac.id//repository/free-robux-no-offers_GM431946152.pdf
    • http://repository.ummy.ac.id//repository/robuxy-com-free-robux_GM431946152.pdf
    • http://repository.ummy.ac.id//repository/how-to-get-free-robux-no-human-verification_GM431946152.pdf
    • http://repository.ummy.ac.id//repository/how-to-get-free-robux-not-a-scam_GM431946152.pdf
    • http://repository.ummy.ac.id/repository/download-the-free-robux-generator-for-roblox_GM431946152.pdf
    • http://repository.ummy.ac.id//repository/coin-master-hack-to-get-free-spins_GM406889139.pdf
    • http://repository.ummy.ac.id/repository/roblox-android-hack-mod_GM431946152.pdf
    • http://repository.ummy.ac.id//repository/coin-master-free-spin-best-link_GM406889139.pdf
    • http://repository.ummy.ac.id/repository/how-to-hack-a-account-with-btools-on-roblox_GM431946152.pdf
    • http://repository.ummy.ac.id/repository/cheat-roblox-fr_GM431946152.pdf
    • http://repository.ummy.ac.id/repository/games-in-roblox-that-give-you-free-robux-2021_GM431946152.pdf
    • http://repository.ummy.ac.id//repository/free-spins-coin-master-blogspot_GM406889139.pdf
    • http://repository.ummy.ac.id//repository/rich-free-roblox-accounts_GM431946152.pdf
    • http://repository.ummy.ac.id/repository/cheat-codes-for-roblox-games_GM431946152.pdf
    • http://repository.ummy.ac.id/repository/free-robux-inspect-element-2021_GM431946152.pdf
    • http://repository.ummy.ac.id//repository/free-minecraft-java-edition_GM479516143.pdf
    • http://repository.ummy.ac.id//repository/how-to-download-minecraft-for-free-ios_GM479516143.pdf
    • http://repository.ummy.ac.id//repository/hack-coin-master-android-game_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002d9d.bin
da771c59090453b57a9eddff79464dbc28d4a12f5b89a2a0ff0c1cda8d5231d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D9D 21924 bytes
font_01_sfnt_off00005e07.bin
0255a8e900c3d17ae6a9e83cf1336d375977936db2301c136bc4fe8c77544982		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E07 19404 bytes

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