Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f655cc5b1cf4823…

MALICIOUS

PDF

34.5 KB Created: 2021-06-20 13:01:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 4899270bed657d214eb2593dfd018904 SHA-1: a4e91b5889937cfaa7aaa73d748489903ca11257 SHA-256: 9f655cc5b1cf4823ad9c4485375a6e24fd27c3571144161abfc403b6c9c4204c
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a primary external URI pointing to game hacks and cheats. The heuristic firings indicate a large number of external links, suggesting a link farm designed to attract users with promises of in-game advantages. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is a lure for potentially harmful downloads.

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/roblox-jailbreak-god-mode-hack-game-hack
    • https://elearning.manesa.sch.id/__statics/gudangsoal/files/free-coin-master-spins-2021_GM406889139.pdf
    • https://elearning.manesa.sch.id/__statics/gudangsoal/files/coin-master-free-link-spin_GM406889139.pdf
    • https://elearning.manesa.sch.id/__statics/gudangsoal/files/fix-error-268-cheat-engine-roblox_GM431946152.pdf
    • https://elearning.manesa.sch.id/__statics/gudangsoal/files/coinmaster-com_GM406889139.pdf
    • https://elearning.manesa.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-today_GM406889139.pdf
    • https://elearning.manesa.sch.id/__statics/gudangsoal/files/how-to-use-cheat-engine-with-roblox_GM431946152.pdf
    • https://elearning.manesa.sch.id/__statics/gudangsoal/files/coin-master-cheats-2021_GM406889139.pdf
    • https://elearning.manesa.sch.id/__statics/gudangsoal/files/free-pet-treats-coin-master_GM406889139.pdf
    • https://elearning.manesa.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-s3x-admin-and-more_GM431946152.pdf
    • https://elearning.manesa.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-2021_GM406889139.pdf
    • https://elearning.manesa.sch.id/__statics/gudangsoal/files/free-coin-master-spins-link_GM406889139.pdf
    • https://elearning.manesa.sch.id/__statics/gudangsoal/files/how-to-send-free-spins-on-coin-master_GM406889139.pdf
    • https://elearning.manesa.sch.id/__statics/gudangsoal/files/free-recorses-on-roblox_GM431946152.pdf
    • https://elearning.manesa.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-blogspot-today_GM406889139.pdf
    • https://elearning.manesa.sch.id/__statics/gudangsoal/files/get-free-robux-today_GM431946152.pdf
    • https://elearning.manesa.sch.id/__statics/gudangsoal/files/free-robux-no-verification-2021-android_GM431946152.pdf
    • https://elearning.manesa.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master_GM406889139.pdf
    • https://elearning.manesa.sch.id/__statics/gudangsoal/files/roblox-system_GM431946152.pdf
    • https://elearning.manesa.sch.id/__statics/gudangsoal/files/coin-master-hack-app_GM406889139.pdf
    • https://elearning.manesa.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003061.bin
4e38c467846cf6455fcf2f88bb636eed85c91d8faf7daea132cd0441a9f28f97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3061 21932 bytes
font_01_sfnt_off000060dc.bin
295c4266e92e0c18716e25a36791b5bcb8aa085f439295543b9c31f189222639		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60DC 19312 bytes

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