Malicious PDF — malware analysis report

Static analysis result for SHA-256 99544bbfd77b9475…

MALICIOUS

PDF

45.6 KB Created: 2021-06-11 04:31:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 2a35cb1da3aa1301727fc9be2d71faac SHA-1: d305f6874ee22d455228b02d92cb82ed570e3150 SHA-256: 99544bbfd77b947597438d00138b465137494aeaed4cf9dec89b591129ad018f
102 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are related to game hacks and cheats, suggesting a lure to download malicious content. The ML classifier strongly indicated maliciousness, and the presence of a link farm further supports a malicious intent to redirect users to potentially harmful resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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 https://netcdn.tw/app/431946152/hack-de-roblox-2021-game-hack
    • http://sttlets.education/senayan//repository/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdf
    • http://sttlets.education/senayan/repository/free-robux-hack-no-human-verification_GM431946152.pdf
    • http://sttlets.education/senayan//repository/apps-for-free-spins-on-coin-master_GM406889139.pdf
    • http://sttlets.education/senayan/repository/coin-master-hack-android-root_GM406889139.pdf
    • http://sttlets.education/senayan/repository/coin-master-free-spin-link-today-download_GM406889139.pdf
    • http://sttlets.education/senayan/repository/free-robux-app_GM431946152.pdf
    • http://sttlets.education/senayan/repository/free-spins-promo-code-for-coin-master_GM406889139.pdf
    • http://sttlets.education/senayan/repository/coin-master-hack-app-ios_GM406889139.pdf
    • http://sttlets.education/senayan/repository/coin-master-free-generator_GM406889139.pdf
    • http://sttlets.education/senayan/repository/robux_GM431946152.pdf
    • http://sttlets.education/senayan//repository/easy-free-spins-coin-master_GM406889139.pdf
    • http://sttlets.education/senayan/repository/how-to-get-free-shields-on-coin-master_GM406889139.pdf
    • http://sttlets.education/senayan/repository/how-to-get-minecraft-for-free-on-your-phone_GM479516143.pdf
    • http://sttlets.education/senayan/repository/roblox-inappropriate_GM431946152.pdf
    • http://sttlets.education/senayan/repository/free-roblox-account-generator-2021_GM431946152.pdf
    • http://sttlets.education/senayan/repository/free-spins-on-coin-master_GM406889139.pdf
    • http://sttlets.education/senayan/repository/coin-master-hack-2021-no-survey_GM406889139.pdf
    • http://sttlets.education/senayan/repository/robux-hacks-were-you-can-download_GM431946152.pdf
    • http://sttlets.education/senayan//repository/minecraft-mod-updater_GM479516143.pdf
    • http://sttlets.education/senayan//repository/minecraft-java-free-download_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004e6d.bin
63568107020952074693ac77e1fb273550459c22c28edad9dde5c2687432e354		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E6D 28096 bytes
font_01_sfnt_off00008e09.bin
f31c750fcd4b295909aaa125138c522712db7cc0f09edbe5a182f15f5d33f051		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E09 18752 bytes

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