Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2662b03f43b4add…

MALICIOUS

PDF

32.7 KB Created: 2021-07-04 18:19:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 6af037f61fb5f9d29c4a4f230e61f580 SHA-1: 52b8af48bc9de111f6bb86da5fe42a60b6cbdd34 SHA-256: a2662b03f43b4add44fc7e51444c52f4c47d2ac4ec560d90fcfcacc85a0a5ab0
102 Risk Score

Malware Insights

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

This PDF document contains numerous links to external websites, many of which are related to game cheats and hacks, suggesting a lure for users to download potentially unwanted or malicious software. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm heuristic further supports its suspicious nature. The document's content and structure indicate an attempt to trick users into visiting malicious sites, likely leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/479516143/free-minecraft-mods-for-xbox-one-game-hack
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/free-coins-coin-master-blog_GM406889139.pdf
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/how-do-you-get-free-robux-on-roblox_GM431946152.pdf
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/claim-coin-master-free-spins_GM406889139.pdf
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/how-to-get-free-robux-on-roblox-no-hacks_GM431946152.pdf
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/coin-master-online-hack-link_GM406889139.pdf
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/how-to-cheat-in-roblox-mega-fun-obby_GM431946152.pdf
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/get-tons-of-robux-free_GM431946152.pdf
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/free-robux-generator-no-verification-2021_GM431946152.pdf
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/robux-games_GM431946152.pdf
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/roblox-games-free_GM431946152.pdf
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/how-to-put-shirts-for-free-on-roblox_GM431946152.pdf
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/free-robux-sites-no-human-verification_GM431946152.pdf
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/how-do-u-get-free-robux-on-mobile_GM431946152.pdf
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/free-robux-hack-generator_GM431946152.pdf
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/hack-robux_GM431946152.pdf
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdf
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/autoclicker-hack-roblox_GM431946152.pdf
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/minecraft-pe-hacks_GM479516143.pdf
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/mosttechs-coin-master-free-spins_GM406889139.pdf
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/blox-pink-robux-free_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002b20.bin
4ba0c96cfedcc7d0ad3f737358153c5df41dbcccc9e110fefe8e118dee30c9dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B20 22076 bytes
font_01_sfnt_off00005bc2.bin
47bb3be3d9075fb99bbeaeccb589831d20ece53da325156c02f517dd299aae8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BC2 18768 bytes

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