Malicious PDF — malware analysis report

Static analysis result for SHA-256 f126591092aac70b…

MALICIOUS

PDF

35.3 KB Created: 2021-07-04 13:41:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: fe4348fffff739bfd7799797773c0c39 SHA-1: c5cfb75a1016170ee95ae78cc8439ad7b600f220 SHA-256: f126591092aac70b675c0e31e11b24bccf8ff1647749ee06c011a910544d127a
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, many of which are structured as SEO-optimized links pointing to game-related hacks and cheats. The ML classifier strongly indicated maliciousness, and the presence of a 'download button' lure reinforces the deceptive nature of the document. The primary goal appears to be directing users to external sites that likely host malware or facilitate further compromise.

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/free-coin-master-spins-hack-game-hack
    • http://library.stikessuakainsan.ac.id/repository/hacks-on-jailbreak-roblox_GM431946152.pdf
    • http://library.stikessuakainsan.ac.id/repository/coin-master-free-spin-whatsapp-group-link_GM406889139.pdf
    • http://library.stikessuakainsan.ac.id//repository/how-to-get-free-robux-on-roblox_GM431946152.pdf
    • http://library.stikessuakainsan.ac.id/repository/free-roblox-audio-sounds-songs-chill-bill_GM431946152.pdf
    • http://library.stikessuakainsan.ac.id/repository/free-draw-1-roblox_GM431946152.pdf
    • http://library.stikessuakainsan.ac.id/repository/roblox-pants-template-download-free_GM431946152.pdf
    • http://library.stikessuakainsan.ac.id/repository/roblox-free-play-no-downloa_GM431946152.pdf
    • http://library.stikessuakainsan.ac.id/repository/free-minecraft-java-edition-codes_GM479516143.pdf
    • http://library.stikessuakainsan.ac.id/repository/how-can-you-get-robux-for-free-on-roblox_GM431946152.pdf
    • http://library.stikessuakainsan.ac.id/repository/how-to-get-free-robux-inspect-element-2021_GM431946152.pdf
    • http://library.stikessuakainsan.ac.id/repository/how-do-you-use-tunturned-roblox-hack_GM431946152.pdf
    • http://library.stikessuakainsan.ac.id/repository/free-robux-that-actually-works-2021_GM431946152.pdf
    • http://library.stikessuakainsan.ac.id/repository/how-to-get-free-robux-in-iphone-6_GM431946152.pdf
    • http://library.stikessuakainsan.ac.id//repository/roblox-gift-card-online-free_GM431946152.pdf
    • http://library.stikessuakainsan.ac.id/repository/coin-master-free-spin-no-offers_GM406889139.pdf
    • http://library.stikessuakainsan.ac.id/repository/how-to-get-free-robux-without-offers_GM431946152.pdf
    • http://library.stikessuakainsan.ac.id/repository/free-prizes-roblox_GM431946152.pdf
    • http://library.stikessuakainsan.ac.id//repository/get-free-robux-gg_GM431946152.pdf
    • http://library.stikessuakainsan.ac.id//repository/free-spin-coin-master-2021-link_GM406889139.pdf
    • http://library.stikessuakainsan.ac.id//repository/free-roblox-accounts-generator_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000327a.bin
a2f4540d652e0caec0e7b8bb610ebfbfe697cb8cc99c56c3dfaa5c942df16694		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x327A 23352 bytes
font_01_sfnt_off0000675f.bin
4d0657ae61433a99d4c3f327acf405e508756c248fc53430885ddf01c25216ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x675F 18344 bytes

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