Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bf4008500326f9c…

MALICIOUS

PDF

34.6 KB Created: 2021-06-23 11:19:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d86cce053a50508c176e8b5a523f806b SHA-1: e669b0499b2a7bd8904742ee3a69a90ec3dcccbb SHA-256: 7bf4008500326f9ce38298ecea20df5a27d8c872c17cf8e91bb8fa9e42079b53
102 Risk Score

Malware Insights

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

The PDF document contains numerous links, including one to 'netcdn.co' and a large farm of links hosted on 'sbairs.com', all related to game hacks and cheats. The presence of a 'download button' heuristic and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content. The document body itself contains the primary lure and the main malicious URL.

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.co/app/431946152/usernames-and-passwords-hack-roblox-game-hack
    • http://www.sbairs.com/datas/files/coin-master-link_GM406889139.pdf
    • http://www.sbairs.com/datas/files/free-robux-generator-2021-no-survey_GM431946152.pdf
    • http://www.sbairs.com/datas/files/free-real-roblox-codes_GM431946152.pdf
    • http://www.sbairs.com/datas/files/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdf
    • http://www.sbairs.com/datas/files/coin-master-hack-tool-without-verification_GM406889139.pdf
    • http://www.sbairs.com/datas/files/stella-beta-roblox-hack-download_GM431946152.pdf
    • http://www.sbairs.com/datas/files/how-to-buy-robux-for-free_GM431946152.pdf
    • http://www.sbairs.com/datas/files/coin-master-free-spin-today_GM406889139.pdf
    • http://www.sbairs.com/datas/files/how-to-setup-a-minecraft-server-for-free_GM479516143.pdf
    • http://www.sbairs.com/datas/files/free-robux-with-no-survey_GM431946152.pdf
    • http://www.sbairs.com/datas/files/free-spin-hack-coin-master-2021_GM406889139.pdf
    • http://www.sbairs.com/datas/files/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdf
    • http://www.sbairs.com/datas/files/free-roblox-clothes_GM431946152.pdf
    • http://www.sbairs.com/datas/files/tiktok-free-fans-cheat_GM835599320.pdf
    • http://www.sbairs.com/datas/files/coin-master-free-coins-cheat_GM406889139.pdf
    • http://www.sbairs.com/datas/files/hacks-to-get-free-robux_GM431946152.pdf
    • http://www.sbairs.com/datas/files/roblox-hack-download_GM431946152.pdf
    • http://www.sbairs.com/datas/files/free-robux-tampermonkey_GM431946152.pdf
    • http://www.sbairs.com/datas/files/free-robux-accounts_GM431946152.pdf
    • http://www.sbairs.com/datas/files/coin-master-free-attack-hack_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f7e.bin
98dbd79d75fe779df777d8aaa5cfafe5dfb72a13a8e8412e380fd66d4c32480e
pdf-font-stream PDF embedded font (sfnt) at offset 0x2F7E 22240 bytes
font_01_sfnt_off000060f0.bin
22edb060dcc94417818c5b9ab672246d68af42d610dc15dea239f25798ca2328
pdf-font-stream PDF embedded font (sfnt) at offset 0x60F0 19408 bytes