Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc65dbccdb203cf3…

MALICIOUS

PDF

33.9 KB Created: 2021-07-07 14:06:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 0bfed72789d9926db6e290886df095ea SHA-1: 13f394369757f04be38489d6efae303de7590f68 SHA-256: fc65dbccdb203cf3766222df27307e86b3b9e8a41e020d2e0dfc547ce83d0687
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are hosted on domains related to game cheats and hacks, suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of generated links, likely for SEO manipulation to attract users searching for cheats. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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.tw/app/431946152/instantrobux-game-hack
    • https://beauty911.tw/upload/files/can-you-make-free-shirts-on-roblox_GM431946152.pdf
    • https://beauty911.tw/upload/files/descargar-roblox-hack-robux-pc_GM431946152.pdf
    • https://beauty911.tw/upload/files/why-free-robux-scams-suck_GM431946152.pdf
    • https://beauty911.tw/upload/files/may-2021-roblox-hack_GM431946152.pdf
    • https://beauty911.tw/upload/files/no-scam-free-robux_GM431946152.pdf
    • https://beauty911.tw/upload/files/free-group-roblox_GM431946152.pdf
    • https://beauty911.tw/upload/files/minecraft-noob-vs-pro-vs-hacker-vs-god_GM479516143.pdf
    • https://beauty911.tw/upload/files/roblox-bee-swarm-simulator-hack-games_GM431946152.pdf
    • https://beauty911.tw/upload/files/slurp-roblox-cheat_GM431946152.pdf
    • https://beauty911.tw/upload/files/hacks-and-cheats-for-coin-master_GM406889139.pdf
    • https://beauty911.tw/upload/files/how-to-get-free-faces-promocodes-on-roblox_GM431946152.pdf
    • https://beauty911.tw/upload/files/coin-master-free-spins-no-generator_GM406889139.pdf
    • https://beauty911.tw/upload/files/hack-para-roblox-jailbreak-coat-y-muchos-mas_GM431946152.pdf
    • https://beauty911.tw/upload/files/how-do-i-get-free-robux-for-roblox_GM431946152.pdf
    • https://beauty911.tw/upload/files/coin-master-spins-gratis_GM406889139.pdf
    • https://beauty911.tw/upload/files/claim-roblox_GM431946152.pdf
    • https://beauty911.tw/upload/files/how-to-hack-people-easy-on-roblox-web-site_GM431946152.pdf
    • https://beauty911.tw/upload/files/coin-master-links-free-spins_GM406889139.pdf
    • https://beauty911.tw/upload/files/roblox-fun-com-free-robux_GM431946152.pdf
    • https://beauty911.tw/upload/files/wurst-115_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000318b.bin
941c9548a1559420703b03d734a0c1928ad438cce9998245f0aa13a44a991ef9
pdf-font-stream PDF embedded font (sfnt) at offset 0x318B 21496 bytes
font_01_sfnt_off0000608b.bin
5a13a4ba7d4aa3ba564163d7fd1f4e40de414e0c8b16d10ac9018e4301010f0d
pdf-font-stream PDF embedded font (sfnt) at offset 0x608B 18656 bytes