Malicious PDF — malware analysis report

Static analysis result for SHA-256 808d7bde6b372ce4…

MALICIOUS

PDF

33.8 KB Created: 2021-07-05 02:44:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: fc3e919c8a4c803599608aef2bc95905 SHA-1: 859c096098fa471114c86bb85b948d6ecca8b836 SHA-256: 808d7bde6b372ce421ad358990012b4e036da6d65c585913c76f74ca889dc3dc
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a large number of embedded links, many of which point to SEO-optimized PDF files related to game hacks and in-game currency. The primary URL, http://netcdn.tw/app/406889139/free-spins-on-coin-master-app-game-hack, suggests a lure for downloading an application. The ML classifier also strongly indicated maliciousness.

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/free-spins-on-coin-master-app-game-hack
    • http://library.apsidoarjo.ac.id/repository/my-robux-generator-free-robux_GM431946152.pdf
    • http://library.apsidoarjo.ac.id//repository/hack-crack-for-coin-master-currency_GM406889139.pdf
    • http://library.apsidoarjo.ac.id/repository/free-robux-generator-no-human-verification-mobile_GM431946152.pdf
    • http://library.apsidoarjo.ac.id/repository/pubg-uc-2021_GM1330123889.pdf
    • http://library.apsidoarjo.ac.id//repository/coin-master-free-spins-gratis_GM406889139.pdf
    • http://library.apsidoarjo.ac.id/repository/how-to-hack-roblox-mm2_GM431946152.pdf
    • http://library.apsidoarjo.ac.id/repository/roblox-free-robux-no-fake_GM431946152.pdf
    • http://library.apsidoarjo.ac.id/repository/can-a-roblox-gift-card-give-free-robux_GM431946152.pdf
    • http://library.apsidoarjo.ac.id/repository/roblox-com-play-now-for-free_GM431946152.pdf
    • http://library.apsidoarjo.ac.id/repository/haktuts-coin-master-free-daily-spins_GM406889139.pdf
    • http://library.apsidoarjo.ac.id/repository/how-to-hack-in-roblox-2021-mac_GM431946152.pdf
    • http://library.apsidoarjo.ac.id/repository/free-roblox-virtual-items-codes_GM431946152.pdf
    • http://library.apsidoarjo.ac.id/repository/coin-master-jackpot-madness-hack_GM406889139.pdf
    • http://library.apsidoarjo.ac.id/repository/app-for-free-robux_GM431946152.pdf
    • http://library.apsidoarjo.ac.id/repository/coin-master-shield-hack_GM406889139.pdf
    • http://library.apsidoarjo.ac.id//repository/coin-master-hack-ios-no-human-verification_GM406889139.pdf
    • http://library.apsidoarjo.ac.id/repository/hacks-for-jailbreak-beta-roblox_GM431946152.pdf
    • http://library.apsidoarjo.ac.id/repository/free-robux-no-hack-no-download-no-survey_GM431946152.pdf
    • http://library.apsidoarjo.ac.id/repository/roblox-robux_GM431946152.pdf
    • http://library.apsidoarjo.ac.id//repository/coin-master-daily-free-spin-and-coin-link-haktuts_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f5b.bin
7d9726ef82ff80afe86834a14e97a2c6700f005ab218b36ee3cd69a0e32a9628		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F5B 22492 bytes
font_01_sfnt_off000061b5.bin
534c6c7c70f10f1d11b04c5b6ffc0fb65311f604414955b61c9990b9160ba559		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61B5 18176 bytes

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