Malicious PDF — malware analysis report

Static analysis result for SHA-256 290e90cbefee3c67…

MALICIOUS

PDF

34.1 KB Created: 2021-07-08 00:06:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a7e4ecc0b4334e7bb2a41caeabbf7697 SHA-1: 73c1147fcec376f3b5658db78a60cd0e754ea8ab SHA-256: 290e90cbefee3c675cd11c0d0a5e9efadd5e1f87e215cfa583bdd47a70baefa3
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are structured as SEO link farms for game hacks and cheats. The document body and extracted URLs suggest a lure for users seeking to cheat in games like Coin Master and Roblox. The ML classifier strongly indicates maliciousness, and the presence of embedded URLs points towards a phishing or malware distribution attempt.

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/coin-master-hack-software-game-hack
    • http://stiepariperpus.web.id/sarjana/repository/minecraft-building-hacks_GM479516143.pdf
    • http://stiepariperpus.web.id/sarjana/repository/free-roblox-stuff-blue-hood_GM431946152.pdf
    • http://stiepariperpus.web.id/sarjana/repository/cmaster-club-coin-master-hack-tool_GM406889139.pdf
    • http://stiepariperpus.web.id/sarjana/repository/free-robux-no-human-verification-no-survey_GM431946152.pdf
    • http://stiepariperpus.web.id/sarjana/repository/how-create-roblox-hack-place_GM431946152.pdf
    • http://stiepariperpus.web.id/sarjana//repository/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdf
    • http://stiepariperpus.web.id/sarjana/repository/como-hackear-coin-master-sin-verificacion-humana_GM406889139.pdf
    • http://stiepariperpus.web.id/sarjana//repository/minecraft-for-chromebook-free_GM479516143.pdf
    • http://stiepariperpus.web.id/sarjana/repository/telecharger-roblox-free_GM431946152.pdf
    • http://stiepariperpus.web.id/sarjana//repository/coin-master-daily-free-coins-link-today_GM406889139.pdf
    • http://stiepariperpus.web.id/sarjana/repository/coin-master-free-spins-hack-without-human-verification_GM406889139.pdf
    • http://stiepariperpus.web.id/sarjana/repository/1-million-robux-for-free_GM431946152.pdf
    • http://stiepariperpus.web.id/sarjana//repository/coin-master-daily-gift-free-spins-and-coins_GM406889139.pdf
    • http://stiepariperpus.web.id/sarjana/repository/roblox-tycoon-simulator-cheat_GM431946152.pdf
    • http://stiepariperpus.web.id/sarjana/repository/how-to-get-free-robux-for-real_GM431946152.pdf
    • http://stiepariperpus.web.id/sarjana/repository/blox-rewards_GM431946152.pdf
    • http://stiepariperpus.web.id/sarjana/repository/list-of-free-robux-codes_GM431946152.pdf
    • http://stiepariperpus.web.id/sarjana/repository/coin-master-hack-uk_GM406889139.pdf
    • http://stiepariperpus.web.id/sarjana/repository/blox-fun-info-free-robux_GM431946152.pdf
    • http://stiepariperpus.web.id/sarjana/repository/easy-way-to-hack-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000316d.bin
8c35bf1c575d87bd5266de951c3c35e849c8aba9af6ffb1e71a07909179d3885		 pdf-font-stream PDF embedded font (sfnt) at offset 0x316D 22280 bytes
font_01_sfnt_off000062fa.bin
8b2230ea6675be3dae677a652bf5a3a8bf2d1463166284366049cff244d27dbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62FA 18168 bytes

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