Malicious PDF — malware analysis report

Static analysis result for SHA-256 db7d37c53e548ea1…

MALICIOUS

PDF

34.5 KB Created: 2021-07-04 06:51:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f7b5a90a4d67d2b10776d6aa7f3a634d SHA-1: 30d64cc9b8de2d3e4ddf7f1b485987acd5e2941c SHA-256: db7d37c53e548ea1ffc9271d32bf60bc69839c3e53b60f6724c02cc274149947
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 part of a link farm, directing users to pages promising game hacks and free in-game items. The ML classifier strongly indicated maliciousness, and the presence of a 'download button' lure further supports a malicious intent to redirect users to potentially harmful content. The primary attack pattern involves tricking users into clicking these links, likely leading to malware downloads or phishing sites.

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.tw/app/431946152/how-to-get-free-things-on-roblox-game-hack
    • http://library.apsidoarjo.ac.id//repository/free-spins-coin-master-daily_GM406889139.pdf
    • http://library.apsidoarjo.ac.id/repository/wikihow-how-to-hack-someones-roblox-account_GM431946152.pdf
    • http://library.apsidoarjo.ac.id/repository/free-minecraft-codes-2021_GM479516143.pdf
    • http://library.apsidoarjo.ac.id/repository/how-to-get-free-cards-on-coin-master_GM406889139.pdf
    • http://library.apsidoarjo.ac.id/repository/spin-hack-for-coin-master_GM406889139.pdf
    • http://library.apsidoarjo.ac.id//repository/free-spin-coin-master-twitter_GM406889139.pdf
    • http://library.apsidoarjo.ac.id//repository/roblox-free-download_GM431946152.pdf
    • http://library.apsidoarjo.ac.id/repository/best-exploit-roblox-free_GM431946152.pdf
    • http://library.apsidoarjo.ac.id//repository/minecraft-hacks-115-2_GM479516143.pdf
    • http://library.apsidoarjo.ac.id/repository/good-roblox-avatars-for-free_GM431946152.pdf
    • http://library.apsidoarjo.ac.id/repository/how-to-get-java-minecraft-free_GM479516143.pdf
    • http://library.apsidoarjo.ac.id/repository/comment-telecharger-un-logiciel-de-hack-dur-roblox_GM431946152.pdf
    • http://library.apsidoarjo.ac.id/repository/how-to-get-free-money-in-mad-city-roblox-hack_GM431946152.pdf
    • http://library.apsidoarjo.ac.id/repository/gratis-und-sicher-free-robux-gekommen_GM431946152.pdf
    • http://library.apsidoarjo.ac.id/repository/coin-master-free-spins-link-no-verification-2021_GM406889139.pdf
    • http://library.apsidoarjo.ac.id//repository/microsoft-robux_GM431946152.pdf
    • http://library.apsidoarjo.ac.id/repository/how-to-put-anti-cheat-on-a-roblox-game_GM431946152.pdf
    • http://library.apsidoarjo.ac.id/repository/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdf
    • http://library.apsidoarjo.ac.id/repository/ho-to-gte-free-robux_GM431946152.pdf
    • http://library.apsidoarjo.ac.id/repository/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f0d.bin
30bbf81304f5fc9afe8eff13d2a0e3815495bdafd2a19f2f21e4bbd6e12732ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F0D 22696 bytes
font_01_sfnt_off0000612e.bin
b68b932afa1663feb9665ea06d56ff2102cae43e6122537b425140c4e8bc7904		 pdf-font-stream PDF embedded font (sfnt) at offset 0x612E 19204 bytes

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