Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a99c0ce170f2ed2…

MALICIOUS

PDF

34.8 KB Created: 2021-07-04 21:46:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 454d46fa709770710956999b765fec20 SHA-1: aaa5221f1c2421e526296b5dec562c439416be25 SHA-256: 6a99c0ce170f2ed2e36b8cfb1c2cf4d728635fdf847989e50d38e58c8fbbe0cb
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous links to external websites, many of which are related to game cheats and free in-game items for popular games like Coin Master and Roblox. The ML classifier strongly indicates maliciousness, and the presence of a link farm heuristic suggests an attempt to manipulate search engine results or distribute malicious content. The document body itself contains a primary URL that appears to be a lure for game-related exploits.

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-free-spins-link-today-blogspot-game-hack
    • http://perpus.ftunismabekasi.ac.id/repository/coin-master-free-coins-and-spins_GM406889139.pdf
    • http://perpus.ftunismabekasi.ac.id/repository/roblox-comment-hacker-robux_GM431946152.pdf
    • http://perpus.ftunismabekasi.ac.id/repository/free-coins-coin-master-today_GM406889139.pdf
    • http://perpus.ftunismabekasi.ac.id/repository/new-free-spins-coin-master_GM406889139.pdf
    • http://perpus.ftunismabekasi.ac.id/repository/free-roblox-toy-codes_GM431946152.pdf
    • http://perpus.ftunismabekasi.ac.id/repository/roblox-free-rbx-2021-june-hack-no-generator_GM431946152.pdf
    • http://perpus.ftunismabekasi.ac.id/repository/how-to-get-any-shirt-for-free-roblox_GM431946152.pdf
    • http://perpus.ftunismabekasi.ac.id/repository/coin-master-free-cards_GM406889139.pdf
    • http://perpus.ftunismabekasi.ac.id/repository/how-to-add-roblox-lua-to-cheat-engine_GM431946152.pdf
    • http://perpus.ftunismabekasi.ac.id/repository/how-to-cheat-in-vampire-hunters-roblox_GM431946152.pdf
    • http://perpus.ftunismabekasi.ac.id/repository/free-minecraft-capes_GM479516143.pdf
    • http://perpus.ftunismabekasi.ac.id/repository/free-package-codes-roblox-2021-november-17_GM431946152.pdf
    • http://perpus.ftunismabekasi.ac.id/repository/how-to-get-free-robux-no-survey_GM431946152.pdf
    • http://perpus.ftunismabekasi.ac.id/repository/how-to-use-a-roblox-hack-script_GM431946152.pdf
    • http://perpus.ftunismabekasi.ac.id/repository/how-to-get-minecraft-for-free-on-mac_GM479516143.pdf
    • http://perpus.ftunismabekasi.ac.id/repository/free-links-to-coin-master_GM406889139.pdf
    • http://perpus.ftunismabekasi.ac.id/repository/how-to-make-robux_GM431946152.pdf
    • http://perpus.ftunismabekasi.ac.id/repository/coin-master-free-coins-link-blogspot_GM406889139.pdf
    • http://perpus.ftunismabekasi.ac.id/repository/roblox-hacked-version-download_GM431946152.pdf
    • http://perpus.ftunismabekasi.ac.id/repository/robux-hack-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003145.bin
36aca36cc83f46fbbfce56b403d523c00187bac09cc1efcf527322364b2e1d8a		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3145 22444 bytes
font_01_sfnt_off00006336.bin
5be1f4e63a68f7f95930536f7900fd499aa82cc302806747a3bcc7f79712d029		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6336 18988 bytes

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