Malicious PDF — malware analysis report

Static analysis result for SHA-256 775937c4352b5c6c…

MALICIOUS

PDF

34.9 KB Created: 2021-07-06 06:35:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: cc3792651da7c344f45c9369c36b0cf7 SHA-1: 42e82cfb8496cc1b307471321304a852c85288a6 SHA-256: 775937c4352b5c6c359c582a5520d361d5a7b20574fc2f461252bad265114a75
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 SEO-optimized to appear as legitimate resources for game cheats and hacks. The primary URL, http://netcdn.tw/app/406889139/coin-master-free-spins-twitter-game-hack, and others hosted on ebook.itn.ac.id, strongly suggest a malicious intent to redirect users to potentially harmful websites. The ML classifier also flagged this PDF with high confidence.

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://ebook.itn.ac.id/repository/roblox-free-domino-crown_GM431946152.pdf
    • http://ebook.itn.ac.id/repository/free-robux-com-no-verification_GM431946152.pdf
    • http://ebook.itn.ac.id/repository/how-to-hack-any-roblox-account_GM431946152.pdf
    • http://ebook.itn.ac.id/repository/carding-for-pubg-uc_GM1330123889.pdf
    • http://ebook.itn.ac.id/repository/coin-master-free-spins-link-blogspot-today_GM406889139.pdf
    • http://ebook.itn.ac.id/repository/how-do-u-get-free-robux-without-builders-club_GM431946152.pdf
    • http://ebook.itn.ac.id/repository/can-you-give-me-free-robux_GM431946152.pdf
    • http://ebook.itn.ac.id/repository/free-executor-for-roblox-pc-2021-no-virus_GM431946152.pdf
    • http://ebook.itn.ac.id/repository/free-spins-on-coin-master-link_GM406889139.pdf
    • http://ebook.itn.ac.id/repository/roblox-how-to-get-free-admin_GM431946152.pdf
    • http://ebook.itn.ac.id/repository/coinmaster-twitter_GM406889139.pdf
    • http://ebook.itn.ac.id/repository/free-roblox-shirt-template-download_GM431946152.pdf
    • http://ebook.itn.ac.id/repository/roblox-free-obc-thumbnail_GM431946152.pdf
    • http://ebook.itn.ac.id/repository/coin-master-free-spin-link-today-50_GM406889139.pdf
    • http://ebook.itn.ac.id/repository/free-robux-without-verification-or-survey_GM431946152.pdf
    • http://ebook.itn.ac.id/repository/minecraft-texture-packs-free-download_GM479516143.pdf
    • http://ebook.itn.ac.id/repository/como-generar-coin-master-free-spins_GM406889139.pdf
    • http://ebook.itn.ac.id/repository/coin-master-hack-apk-no-fb-login_GM406889139.pdf
    • http://ebook.itn.ac.id/repository/coin-master-free-coin-and-spin-app_GM406889139.pdf
    • http://ebook.itn.ac.id/repository/free-robux-generator-for-roblox-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000301a.bin
a660df5fb75c910cab0e0d4d177907c7d148a872ed5b5bf1fea301886928185f		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x301A 23520 bytes
font_01_sfnt_off00006562.bin
abbe9628f892dbb62650ce0db0182e7fd8745ccab8f80121ec4badf33f99fb7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6562 18336 bytes

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