Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fdb61def0ee8d08…

MALICIOUS

PDF

35.0 KB Created: 2021-06-26 01:41:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 9f530b777de043a1b85ac146dd80a6cb SHA-1: 7c0d6745100f1dc55d93eb8c84d6fa1370156507 SHA-256: 3fdb61def0ee8d089617b15ae77edb91b1ffa30ca1c8405f94bf6b03ddc7f7a1
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links and a primary URL, all disguised as guides for hacking games, which is a common lure for malicious downloads. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to attract users seeking exploits or cheats. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the content strongly suggest a phishing or malware distribution attempt, likely initiated via spearphishing.

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/how-to-hack-roblox-games-mac-game-hack
    • https://tjiko.de/wp-content/uploads/fsqm-files/how-to-hack-on-roblox-on-pc_GM431946152.pdf
    • https://tjiko.de/wp-content/uploads/fsqm-files/roblox-free-vip-server-mad-city_GM431946152.pdf
    • https://tjiko.de/wp-content/uploads/fsqm-files/how-to-hack-into-a-roblox-acount_GM431946152.pdf
    • https://tjiko.de/wp-content/uploads/fsqm-files/robux-hack-generator_GM431946152.pdf
    • https://tjiko.de/wp-content/uploads/fsqm-files/coin-master-free-spins-link-blogspot-2021_GM406889139.pdf
    • https://tjiko.de/wp-content/uploads/fsqm-files/how-to-get-free-robux-on-phone-2021_GM431946152.pdf
    • https://tjiko.de/wp-content/uploads/fsqm-files/roblox-com-robux-cheat_GM431946152.pdf
    • https://tjiko.de/wp-content/uploads/fsqm-files/roblox-champion-tshirt-free_GM431946152.pdf
    • https://tjiko.de/wp-content/uploads/fsqm-files/rover-hack-roblox_GM431946152.pdf
    • https://tjiko.de/wp-content/uploads/fsqm-files/how-to-buy-free-robux-2021_GM431946152.pdf
    • https://tjiko.de/wp-content/uploads/fsqm-files/free-robux-vending-machine_GM431946152.pdf
    • https://tjiko.de/wp-content/uploads/fsqm-files/hack-para-booga-booga-roblox_GM431946152.pdf
    • https://tjiko.de/wp-content/uploads/fsqm-files/ex07-v-012-hack-roblox_GM431946152.pdf
    • https://tjiko.de/wp-content/uploads/fsqm-files/best-free-exploit-for-roblox_GM431946152.pdf
    • https://tjiko.de/wp-content/uploads/fsqm-files/roblox-waterpark-noodle-for-free_GM431946152.pdf
    • https://tjiko.de/wp-content/uploads/fsqm-files/discord-servers-that-give-free-robux_GM431946152.pdf
    • https://tjiko.de/wp-content/uploads/fsqm-files/how-to-get-free-robux_GM431946152.pdf
    • https://tjiko.de/wp-content/uploads/fsqm-files/free-spins-on-coin-master-2021_GM406889139.pdf
    • https://tjiko.de/wp-content/uploads/fsqm-files/how-to-get-free-gamepasses-roblox-2021_GM431946152.pdf
    • https://tjiko.de/wp-content/uploads/fsqm-files/apps-that-give-you-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_off000030e5.bin
e7d0d31d699fea94cf978744b35c59c65e5052119dd007c731aaead4ae11f257
pdf-font-stream PDF embedded font (sfnt) at offset 0x30E5 22500 bytes
font_01_sfnt_off00006315.bin
b57d8a1713b922503ba4a3907e99a3819f981a7a321e9dc234e656d2df0eb9ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x6315 19276 bytes