Malicious PDF — malware analysis report

Static analysis result for SHA-256 710522ccb0a2c6c6…

MALICIOUS

PDF

33.8 KB Created: 2021-07-05 17:23:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: e6bc23e6d4e9d316dae1c799ebe6a9f6 SHA-1: 618a184f4006963f811930465dfb308ddba9d18d SHA-256: 710522ccb0a2c6c67db286370239eed40de95c50eca32cb86db39917e0534092
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are designed to appear as download pages or hacks for popular games. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of these links, suggesting a coordinated effort to direct users to potentially malicious sites. The ML classifier also strongly flagged this PDF as malicious. The document body and extracted URLs point towards a lure for game-related cheats or currency, which is a common tactic for phishing or malware distribution.

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/406889139/coin-master-free-spins-twitter-game-hack
    • http://perpus.smkn1pemangkat.sch.id/repository/robux-com-free-robux_GM431946152.pdf
    • http://perpus.smkn1pemangkat.sch.id/repository/coin-master-free-spons-apk-2021_GM406889139.pdf
    • http://perpus.smkn1pemangkat.sch.id/repository/roblox-online-free-no-download_GM431946152.pdf
    • http://perpus.smkn1pemangkat.sch.id//repository/coin-master-hack-tool-ios_GM406889139.pdf
    • http://perpus.smkn1pemangkat.sch.id/repository/free-spins-in-coin-master-without-human-verification_GM406889139.pdf
    • http://perpus.smkn1pemangkat.sch.id/repository/coin-master-free-spins-link-june-2021_GM406889139.pdf
    • http://perpus.smkn1pemangkat.sch.id/repository/ninja-legends-hackauto-farmer-free-op-swordroblox_GM431946152.pdf
    • http://perpus.smkn1pemangkat.sch.id//repository/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdf
    • http://perpus.smkn1pemangkat.sch.id/repository/minecraft-servers-that-allow-hacks_GM479516143.pdf
    • http://perpus.smkn1pemangkat.sch.id/repository/haktuts-coin-master-free-spins-2021_GM406889139.pdf
    • http://perpus.smkn1pemangkat.sch.id/repository/coin-master-hack-account_GM406889139.pdf
    • http://perpus.smkn1pemangkat.sch.id//repository/tiktok-free-nose-job_GM835599320.pdf
    • http://perpus.smkn1pemangkat.sch.id/repository/can-you-get-free-robux-on-roblox_GM431946152.pdf
    • http://perpus.smkn1pemangkat.sch.id/repository/rbxdemon_GM431946152.pdf
    • http://perpus.smkn1pemangkat.sch.id/repository/robux-online_GM431946152.pdf
    • http://perpus.smkn1pemangkat.sch.id/repository/is-windows-10-minecraft-free_GM479516143.pdf
    • http://perpus.smkn1pemangkat.sch.id//repository/free-spin-coin-master-iphone_GM406889139.pdf
    • http://perpus.smkn1pemangkat.sch.id/repository/free-spins-coin-master-ios-2021_GM406889139.pdf
    • http://perpus.smkn1pemangkat.sch.id//repository/coin-master-free-spins-link-download-hack_GM406889139.pdf
    • http://perpus.smkn1pemangkat.sch.id//repository/coin-master-free-coins-and-spins-link_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f8f.bin
7767e61335a55b9c26be014f50bd8df8d0c963f7bd99c431ea2fc16bbffc2b7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F8F 22376 bytes
font_01_sfnt_off00006125.bin
abbe9628f892dbb62650ce0db0182e7fd8745ccab8f80121ec4badf33f99fb7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6125 18336 bytes

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