Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1dee5cf884a1cce…

MALICIOUS

PDF

35.3 KB Created: 2021-06-28 11:44:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c94bed3217ab67e7d82c37c345902ba4 SHA-1: aa3b717f519880210b287e70e523bf8a391377ad SHA-256: c1dee5cf884a1cce9bf0a6502389a8c46a6b1d44b81cce357a2f498a71822bb8
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs and a document body that explicitly advertises game hacks and cheats, such as for Roblox and Coin Master. The heuristic findings indicate a mass of external links, suggesting a link farm designed to lure users to download further content. The ML classifier also flagged this PDF as malicious with high confidence.

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/roblox-jailbreak-hack-script-2021-game-hack
    • http://hometech.tw/ckfinder/userfiles/files/hack-version-of-coin-master_GM406889139.pdf
    • http://hometech.tw/ckfinder/userfiles/files/roblox-map-hack_GM431946152.pdf
    • http://hometech.tw/ckfinder/userfiles/files/minecraft-pocket-edition-mods-for-free_GM479516143.pdf
    • http://hometech.tw/ckfinder/userfiles/files/how-to-get-free-robux-promo-codes_GM431946152.pdf
    • http://hometech.tw/ckfinder/userfiles/files/how-to-hack-a-roblox-account-easy_GM431946152.pdf
    • http://hometech.tw/ckfinder/userfiles/files/minecraft-bedrock-free-with-java_GM479516143.pdf
    • http://hometech.tw/ckfinder/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdf
    • http://hometech.tw/ckfinder/userfiles/files/easy-how-to-get-free-robux_GM431946152.pdf
    • http://hometech.tw/ckfinder/userfiles/files/free-tiktok-followers_GM835599320.pdf
    • http://hometech.tw/ckfinder/userfiles/files/roblox-marshmello-black-shirt-free_GM431946152.pdf
    • http://hometech.tw/ckfinder/userfiles/files/google-how-do-you-get-free-robux_GM431946152.pdf
    • http://hometech.tw/ckfinder/userfiles/files/cute-free-stuff-on-roblox_GM431946152.pdf
    • http://hometech.tw/ckfinder/userfiles/files/how-to-counter-hack-a-hacker-on-roblox_GM431946152.pdf
    • http://hometech.tw/ckfinder/userfiles/files/robux-hack-no-download-or-verification_GM431946152.pdf
    • http://hometech.tw/ckfinder/userfiles/files/free-robux-no-human-verify_GM431946152.pdf
    • http://hometech.tw/ckfinder/userfiles/files/free-hacks-for-coin-master_GM406889139.pdf
    • http://hometech.tw/ckfinder/userfiles/files/free-robux-generator-no-download-no-verification-2021_GM431946152.pdf
    • http://hometech.tw/ckfinder/userfiles/files/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdf
    • http://hometech.tw/ckfinder/userfiles/files/minecraft-linux-free_GM479516143.pdf
    • http://hometech.tw/ckfinder/userfiles/files/hack-coin-master-32-mod-apk_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000321d.bin
10f5606869cfa963f3e99afb27f75670a19757dde9256d775765f44b48d78ea4
pdf-font-stream PDF embedded font (sfnt) at offset 0x321D 22188 bytes
font_01_sfnt_off0000630a.bin
2734742264cf1c02f26abf54efb44ebc07fce0d5d120827c14a369351ed123bf
pdf-font-stream PDF embedded font (sfnt) at offset 0x630A 19624 bytes