Malicious PDF — malware analysis report

Static analysis result for SHA-256 88171d50a750f68d…

MALICIOUS

PDF

42.4 KB Created: 2021-05-18 00:34:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d132bd3cb5441696f67860ff9b1351be SHA-1: a4857f07291862632c499c1d405fb80bf629d26f SHA-256: 88171d50a750f68de036a5b6b837176c1eb981a4ad6e6f7d92024bf2bae2b921
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous links to external websites, many of which are hosted on 'kinderdam.nl' and appear to be part of a link farm designed to attract users searching for game cheats and free virtual currency. The presence of a 'download button' heuristic and the ML classifier's high confidence score indicate malicious intent. The primary goal appears to be directing users to potentially malicious sites or downloads through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/bloxland-earn-free-robux-game-hack
    • https://kinderdam.nl/images/free-robux-just-click_GM431946152.pdf
    • https://kinderdam.nl/images/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdf
    • https://kinderdam.nl/images/roblox-cheat-robux_GM431946152.pdf
    • https://kinderdam.nl/images/wurst-hacked-client_GM479516143.pdf
    • https://kinderdam.nl/images/today-free-spin-coin-master_GM406889139.pdf
    • https://kinderdam.nl/images/free-robux-real-working_GM431946152.pdf
    • https://kinderdam.nl/images/how-to-get-unlimited-robux-2021_GM431946152.pdf
    • https://kinderdam.nl/images/no-human-verification-hack-for-coin-master_GM406889139.pdf
    • https://kinderdam.nl/images/completed-coin-master-hack_GM406889139.pdf
    • https://kinderdam.nl/images/coin-master-hack-mod-apk-free-download_GM406889139.pdf
    • https://kinderdam.nl/images/free-spin-app-coin-master_GM406889139.pdf
    • https://kinderdam.nl/images/coin-master-hacks-no-downloading_GM406889139.pdf
    • https://kinderdam.nl/images/mangocheats-com-hack-coin-master-cheat_GM406889139.pdf
    • https://kinderdam.nl/images/hey-google-how-do-you-get-free-robux_GM431946152.pdf
    • https://kinderdam.nl/images/get-free-coins-for-coin-master_GM406889139.pdf
    • https://kinderdam.nl/images/how-to-get-free-robux-hack-2021_GM431946152.pdf
    • https://kinderdam.nl/images/coin-master-attack-madness-hack_GM406889139.pdf
    • https://kinderdam.nl/images/coinmaster-twitter_GM406889139.pdf
    • https://kinderdam.nl/images/free-spins-coin-master-cheats_GM406889139.pdf
    • https://kinderdam.nl/images/coin-master-mod-free-download_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000047f8.bin
d2c9e5c58200e6d631563aa0263de97b0f70561f288f68b6461c571fc2f23629
pdf-font-stream PDF embedded font (sfnt) at offset 0x47F8 26424 bytes
font_01_sfnt_off000082c6.bin
fc87a0e838629003b9f405fc2c8429e0a8062f092f4b8629944097aaaaee9c58
pdf-font-stream PDF embedded font (sfnt) at offset 0x82C6 18492 bytes