Malicious PDF — malware analysis report

Static analysis result for SHA-256 d42e6284afb0e61e…

MALICIOUS

PDF

42.1 KB Created: 2021-05-16 00:08:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0cb729cc8f9eca7b988a16281127f04c SHA-1: a9c19180c75bc8370c7a3780ae1ee7f6166afd38 SHA-256: d42e6284afb0e61e34962530d01b4b4bb3f33b909dff29d0a304d36562c68590
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/hack-coin-master-apk-3.2-download-game-hack PDF link annotation
    • http://pustakafpsi.uin-suska.ac.id/repository/60-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/get-coin-master-spins-free_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/wwwhaktutsin-2021-08-coinmasterfreespinandcoinlinkhtml-m-1_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/facebook-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/coin-master-free-download-app_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/free-spin-coin-master-hacktoman_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/free-spins-link-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/como-hackear-coin-master-2021-espaol_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/free-spins-coin-master-october-13-2021_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/free-coin-master-gold-cards_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/minecraft-wurst_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004927.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4927 24068 bytes
SHA-256: 22e694d7e04e65ceaccaf823fa9493568b693839e4db2098b9d79de088cd7a6e
font_01_sfnt_off00008030.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8030 18836 bytes
SHA-256: d746a7c1c5cf5be311eddf8676cfb9402845d24e0d8fc8e00b27a1d9de62f851

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