Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8823678f451d5ee…

MALICIOUS

PDF

32.8 KB Created: 2021-06-28 03:29:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1c54df68e3b963b5656c4bc37e7ae831 SHA-1: 9dd797416da7a8fb93c9594c55c2bdbd75a4ba26 SHA-256: c8823678f451d5eed026219fb05dfbaf3dee96e9097fe74938069949b45759e9
102 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a link farm, containing numerous external links to websites offering game cheats and hacks. The presence of a download button lure and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content. The document's primary purpose appears to be to distribute links that could lead to malware downloads or further exploitation.

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.co/app/431946152/counter-blox-roblox-offensive-free-esl-game-hack
    • http://www.pspmrsmmbk.com/cendana/repository/coin-master-free-coins-and-spins-daily_GM406889139.pdf
    • http://www.pspmrsmmbk.com/cendana/repository/free-spin-coin-master-2021-link_GM406889139.pdf
    • http://www.pspmrsmmbk.com/cendana/repository/coin-master-free-spins-link-june-2021_GM406889139.pdf
    • http://www.pspmrsmmbk.com/cendana/repository/list-of-hacked-roblox-accounts_GM431946152.pdf
    • http://www.pspmrsmmbk.com/cendana/repository/online-coin-master-free-spin-app_GM406889139.pdf
    • http://www.pspmrsmmbk.com/cendana/repository/elektronomia-free-roblox_GM431946152.pdf
    • http://www.pspmrsmmbk.com/cendana//repository/coin-master-cheats-without-verification_GM406889139.pdf
    • http://www.pspmrsmmbk.com/cendana//repository/hack-coin-master-32-mod-apk_GM406889139.pdf
    • http://www.pspmrsmmbk.com/cendana/repository/pubg-uc-voucher_GM1330123889.pdf
    • http://www.pspmrsmmbk.com/cendana/repository/coin-master-links-for-free-spins-2021_GM406889139.pdf
    • http://www.pspmrsmmbk.com/cendana/repository/minecraft-windows-10-edition-free-with-java_GM479516143.pdf
    • http://www.pspmrsmmbk.com/cendana/repository/can-you-get-roblox-on-xbox-one-for-free_GM431946152.pdf
    • http://www.pspmrsmmbk.com/cendana//repository/free-coin-master-spins-and-coins_GM406889139.pdf
    • http://www.pspmrsmmbk.com/cendana//repository/minecraft-apk-download-v1-144-2-free_GM479516143.pdf
    • http://www.pspmrsmmbk.com/cendana/repository/coin-master-free-shield_GM406889139.pdf
    • http://www.pspmrsmmbk.com/cendana/repository/free-roblox-followers_GM431946152.pdf
    • http://www.pspmrsmmbk.com/cendana/repository/roblox-games-for-free-please_GM431946152.pdf
    • http://www.pspmrsmmbk.com/cendana/repository/free-spins-for-coin-master-2021_GM406889139.pdf
    • http://www.pspmrsmmbk.com/cendana//repository/how-to-get-minecraft-for-free-on-tablet_GM479516143.pdf
    • http://www.pspmrsmmbk.com/cendana/repository/websites-to-get-free-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_off00002a64.bin
2333295d47e1b4f545b47da66f6477b27f27a8cf39a7d74225ea28b062819d1b
pdf-font-stream PDF embedded font (sfnt) at offset 0x2A64 22096 bytes
font_01_sfnt_off00005b58.bin
ba15fb5a8ec3611053bc7ee5c88883231a48810683a9062631171bf289437ca5
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B58 19128 bytes