Malicious PDF — malware analysis report

Static analysis result for SHA-256 611b836de84fe014…

MALICIOUS

PDF

34.7 KB Created: 2021-06-27 23:37:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 832199d348c2228889f4a076709c921e SHA-1: 67d091ee1540a966f5572589d3d37cd88ce2119c SHA-256: 611b836de84fe0144f5490b174066d1fbe7112301d0f04089cda72a8007c2b7c
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, including one to 'netcdn.co', which likely serves as a lure for downloading malicious content related to game hacking. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to distribute further malicious payloads or phish for credentials. The ML classifier also strongly flagged this PDF as malicious.

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/how-to-make-a-dll-hack-roblox-game-hack PDF link annotation
    • http://perpus.i2s-learning.com/repository/roblox-make-shirt-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-500-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-get-robux-hack-on-phone_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/op-rewards-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-minecraft-resource-packs_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/how-to-earn-free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/find-roblox-on-computer-hack-in-escape-from-the-demon_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/febuary-2021-roblox-hacking-client_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/minecraft-windows-10-free-with-java_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/best-parkour-free-run-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-hack-your-friends-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-robux-no-offer-no-survey_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-get-free-robux-no-survey-no-download_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-roblox-gift-card-giveaway_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-robux-100-working-pastebin_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-legally-get-free-spins-in-coin-master_GM406889139.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_off000030d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30D6 22168 bytes
SHA-256: 52c925626a17321bc7e9011f66d61661987598ab57187b7b873a8635bfc4fa5e
font_01_sfnt_off00006212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6212 19184 bytes
SHA-256: 0ceb024cfd7f5b8d9fd9f1781b00c091a8b3fda2f4bcddef5700df40a1ece747

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