Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1c73a9642a0e772…

MALICIOUS

PDF

44.3 KB Created: 2021-05-12 00:19:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: e04400081f2ce0c1ea46975475497063 SHA-1: 5bdc6f114614878ea4bec82c37d842e0b77bf839 SHA-256: b1c73a9642a0e772616b483ab5613530d5fbdd8fddabc5dde54fb9fe93b3b742
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous embedded links, many of which are structured as a link farm, suggesting an attempt to direct users to potentially malicious content. The presence of a 'download button' lure further supports this. While no scripts were explicitly extracted, the PDF structure and the nature of the URLs indicate a likely spearphishing attachment designed to lead users to external sites for 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 https://netcdn.xyz/app/431946152/grab-points-login-game-hack
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/free-minecraft-svg-cutting-files_GM479516143.pdf
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-hack_GM431946152.pdf
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/how-to-get-free-roebucks-in-roblox_GM431946152.pdf
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdf
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/doctor-louie-roblox_GM431946152.pdf
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-no-survey_GM431946152.pdf
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-games_GM431946152.pdf
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdf
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/coin-master-free-spins-facebook_GM406889139.pdf
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/get-free-robux-com_GM431946152.pdf
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/se-puede-hackear-coin-master_GM406889139.pdf
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-inspect_GM431946152.pdf
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/robux-hack-2021_GM431946152.pdf
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins_GM406889139.pdf
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/cute-free-roblox-clothes_GM431946152.pdf
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/minecraft-windows-10-edition-unlock-full-game-free_GM479516143.pdf
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/free-coin-master-spins-no-human-verification_GM406889139.pdf
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/hacked-roblox-game_GM431946152.pdf
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins-daily_GM406889139.pdf
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/minecraft-free-download-linux_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c16.bin
d8e52932f860f99b8c8d29ebd801235a1c4c3cf782fa49ec273ff10705f3bc18		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C16 27676 bytes
font_01_sfnt_off00008a75.bin
fc3b6864308346bb667edf65a60750cf482e642961677f682e1928b6bbdda02f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A75 18392 bytes

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