Malicious PDF — malware analysis report

Static analysis result for SHA-256 56b14b477ad8054c…

MALICIOUS

PDF

44.7 KB Created: 2021-06-03 04:01:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ace16932074e4d70edb7dd3a94382045 SHA-1: ee27a39e4aee721e8565c2f93b877993384c6430 SHA-256: 56b14b477ad8054c51db6483e6b608e02fa364b7f7f7b5ea23abad18748e16c6
122 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are structured as SEO-optimized links for game hacks and exploits. The presence of a "download button" lure and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content. The document's content and structure strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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 https://netcdn.online/app/479516143/best-minecraft-hacks-game-hack
    • http://perpus.unik-kediri.ac.id/repository/coin-master-hack-without-verification_GM406889139.pdf
    • http://perpus.unik-kediri.ac.id/repository/free-robux-group-payouts_GM431946152.pdf
    • http://perpus.unik-kediri.ac.id/repository/minecraft-survival-free_GM479516143.pdf
    • http://perpus.unik-kediri.ac.id/repository/how-to-hack-roblox-accounts-on-phone_GM431946152.pdf
    • http://perpus.unik-kediri.ac.id/repository/coin-master-date-and-time-hack_GM406889139.pdf
    • http://perpus.unik-kediri.ac.id/repository/coin-master-hack-apk-latest-version-2021_GM406889139.pdf
    • http://perpus.unik-kediri.ac.id/repository/today-coin-master-free-coins-link_GM406889139.pdf
    • http://perpus.unik-kediri.ac.id/repository/free-spins-and-coins-coin-master-2021-link_GM406889139.pdf
    • http://perpus.unik-kediri.ac.id/repository/download-hacked-games-coin-master_GM406889139.pdf
    • http://perpus.unik-kediri.ac.id/repository/how-to-get-free-robux-without-verification_GM431946152.pdf
    • http://perpus.unik-kediri.ac.id/repository/free-robux-with-no-human-verification_GM431946152.pdf
    • http://perpus.unik-kediri.ac.id/repository/coin-master-game-hacking-tricks_GM406889139.pdf
    • http://perpus.unik-kediri.ac.id/repository/games-that-can-be-hacked_GM431946152.pdf
    • http://perpus.unik-kediri.ac.id/repository/buy-robux-free_GM431946152.pdf
    • http://perpus.unik-kediri.ac.id/repository/how-to-hack-someones-roblox-account-2021_GM431946152.pdf
    • http://perpus.unik-kediri.ac.id/repository/how-you-get-free-robux_GM431946152.pdf
    • http://perpus.unik-kediri.ac.id/repository/robux-com-free-robux_GM431946152.pdf
    • http://perpus.unik-kediri.ac.id/repository/coin-master-unlimited-spin-apk-free-download_GM406889139.pdf
    • http://perpus.unik-kediri.ac.id/repository/www-claim-gg-to-earn-free-robux_GM431946152.pdf
    • http://perpus.unik-kediri.ac.id/repository/no-human-verification-coin-master-hack_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000055a8.bin
9a3a382121d42f9b8205dcfe6914a889c41c179f581274816d24baaa622c1805		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x55A8 24720 bytes
font_01_sfnt_off00008d75.bin
6dfee1982b58ab3489cc821793519200b658269375d8b02cd788103d93863fb8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D75 17952 bytes

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