Malicious PDF — malware analysis report

Static analysis result for SHA-256 51185e8adb3cbe15…

MALICIOUS

PDF

34.1 KB Created: 2021-06-30 08:46:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 35c19bd55f73a82fdc1aa221db776199 SHA-1: ec29616097a6fa07548b6b60af007de1fa33019f SHA-256: 51185e8adb3cbe1505bf9ea309e0ffe5d9c47eebff562a0af8f6fe63ec6c37da
102 Risk Score

Malware Insights

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

The PDF document contains a significant number of external links, many of which are presented as download opportunities for in-game currency or items related to popular games like Roblox and Coin Master. The presence of a 'download button' heuristic and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content or phishing sites. No scripts were extracted from this sample.

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/free-dominus-roblox-code-game-hack
    • http://elib.upiyptk.ac.id/opac/repository/shirt-template-roblox-free-shipping_GM431946152.pdf
    • http://elib.upiyptk.ac.id/opac/repository/can-you-actually-get-free-robux_GM431946152.pdf
    • http://elib.upiyptk.ac.id/opac/repository/offers-for-robux_GM431946152.pdf
    • http://elib.upiyptk.ac.id/opac/repository/hacks-for-rubux-on-roblox_GM431946152.pdf
    • http://elib.upiyptk.ac.id/opac//repository/how-do-you-get-roblox-money_GM431946152.pdf
    • http://elib.upiyptk.ac.id/opac/repository/roblox-c9m_GM431946152.pdf
    • http://elib.upiyptk.ac.id/opac/repository/can-you-get-banned-on-roblox-for-using-cheat-engine_GM431946152.pdf
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-free-500-spins-link_GM406889139.pdf
    • http://elib.upiyptk.ac.id/opac/repository/free-roblox-com_GM431946152.pdf
    • http://elib.upiyptk.ac.id/opac//repository/gaming-dunia-coin-master-free-spins_GM406889139.pdf
    • http://elib.upiyptk.ac.id/opac//repository/download-minecraft-free-hiapphere_GM479516143.pdf
    • http://elib.upiyptk.ac.id/opac//repository/get-free-spins-coin-master-2021_GM406889139.pdf
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-hack-without-verification-site-zyngaplayerforumscom_GM406889139.pdf
    • http://elib.upiyptk.ac.id/opac/repository/free-spin-coin-master-2021-link_GM406889139.pdf
    • http://elib.upiyptk.ac.id/opac//repository/coin-master-free-spin-generator-without-human-verification_GM406889139.pdf
    • http://elib.upiyptk.ac.id/opac//repository/coin-master-free-spins-and-coins-haktuts_GM406889139.pdf
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-spin-hack-link_GM406889139.pdf
    • http://elib.upiyptk.ac.id/opac//repository/give-free-robux_GM431946152.pdf
    • http://elib.upiyptk.ac.id/opac//repository/free-robux-without-human-verification-real_GM431946152.pdf
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-unlimited-free-spins-link-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ea6.bin
19d725fafff862f799adfdc55a6b11d70d33f5d479f4dbdd2fb7ea47d3d835c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2EA6 21940 bytes
font_01_sfnt_off00005f01.bin
b35726750cc43e2aee8479e1535d69613d7da869165d086408a46ff4d34aa7d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F01 19512 bytes

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