Malicious PDF — malware analysis report

Static analysis result for SHA-256 69710b9b54690914…

MALICIOUS

PDF

33.9 KB Created: 2021-07-04 09:16:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 198c7f9abda3e212d65ebfb24dbf6cf3 SHA-1: d3f1f522387a13a5162f1d42935317d8eb9e1b44 SHA-256: 69710b9b54690914496c107632ae50125273ec9fca511a7c28db51b38eed569d
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links and a call-to-action phrase, directing users to websites offering game cheats and virtual currency. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, and the ML classifier strongly suggests maliciousness. The primary IOC is the URL http://netcdn.tw/app/431946152/free-roblox-promo-codes-for-robux-game-hack, which is likely used to deliver a secondary payload or redirect to a phishing site.

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/free-roblox-promo-codes-for-robux-game-hack PDF link annotation
    • https://digilib.stieama.ac.id/repository/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-game-items-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/wie-kann-man-wie-kann-man-cheaten-bei-roblox-geld_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-exclusive-virtual-item-codes-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-games-for-free-for-you-to-play_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-bird-simulator-cheats_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-minecraft-for-free-on-mobile_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-hack-coin-master-apkmody_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-install-lego-hacks-for-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-game-hacks_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-minecraft-for-free-on-ipad_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-minecraft-server-hosting-with-plugins_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-hack-times-in-roblox-games_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/mine-minecraft-games-for-free_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-hack-tool-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-roblox-2021-agreeing_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F4F 21556 bytes
SHA-256: 9c023d03058e7881ba2395b33f261df0560d4507366bd5da1067c91f9f3006dc
font_01_sfnt_off00005e79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E79 19380 bytes
SHA-256: b9e13cbc0d8b8e2fa33e227b4ba01f3d99a632c345b6e3dc52c76698f84cc7c7

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