Malicious PDF — malware analysis report

Static analysis result for SHA-256 d66292a90b17922d…

MALICIOUS

PDF

33.6 KB Created: 2021-07-05 01:41:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 7e0e25bd37a1b686d416d61a41e934d3 SHA-1: 536fb75ee25c6713a6002be01b136b691eae5064 SHA-256: d66292a90b17922d4c395fef4600893b06b77cfe45bbb27635a69452bbbac8fb
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which are presented as links to game-related content such as 'free robux' or 'minecraft hacks'. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm or phishing attempt. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves luring users to external sites that likely host further malicious content or scams.

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/479516143/minecraft-name-tag-hacks-game-hack
    • http://www.valenciamaids.com/userfiles/files/how-to-get-free-robux-for-kids_GM431946152.pdf
    • http://www.valenciamaids.com/userfiles/files/minecraft-bedrock-client_GM479516143.pdf
    • http://www.valenciamaids.com/userfiles/files/how-to-get-free-robux-legit-2021_GM431946152.pdf
    • http://www.valenciamaids.com/userfiles/files/easy-how-to-get-free-robux_GM431946152.pdf
    • http://www.valenciamaids.com/userfiles/files/free-printable-minecraft-coloring-pages_GM479516143.pdf
    • http://www.valenciamaids.com/userfiles/files/coin-master-link-app_GM406889139.pdf
    • http://www.valenciamaids.com/userfiles/files/coin-master-free-spin-link-today-download_GM406889139.pdf
    • http://www.valenciamaids.com/userfiles/files/apps-to-get-free-robux_GM431946152.pdf
    • http://www.valenciamaids.com/userfiles/files/roblox-guest-arms-free_GM431946152.pdf
    • http://www.valenciamaids.com/userfiles/files/what-player-got-banned-for-using-free-models-roblox_GM431946152.pdf
    • http://www.valenciamaids.com/userfiles/files/free-spins-coin-master-2021-hack_GM406889139.pdf
    • http://www.valenciamaids.com/userfiles/files/free-robux-no-verify-2021_GM431946152.pdf
    • http://www.valenciamaids.com/userfiles/files/robux-hack-no-human-verification-no-download-no-survey-2021_GM431946152.pdf
    • http://www.valenciamaids.com/userfiles/files/how-to-get-free-robux-2021-hack_GM431946152.pdf
    • http://www.valenciamaids.com/userfiles/files/free-robux-gift-card-codes_GM431946152.pdf
    • http://www.valenciamaids.com/userfiles/files/roblox-free-clothes-hack_GM431946152.pdf
    • http://www.valenciamaids.com/userfiles/files/free-robux-come_GM431946152.pdf
    • http://www.valenciamaids.com/userfiles/files/coin-master-how-to-get-free-pet-food_GM406889139.pdf
    • http://www.valenciamaids.com/userfiles/files/free-coins-on-coin-master_GM406889139.pdf
    • http://www.valenciamaids.com/userfiles/files/roblox-hack-download-pc_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000305e.bin
3c3895583d06e501fab401aa04c1e07f50d81e4b20f31b317ae4804b433048a2
pdf-font-stream PDF embedded font (sfnt) at offset 0x305E 22244 bytes
font_01_sfnt_off00006103.bin
eb7ed4260d6d64c3cd9f3242d6af3157cea31df7eff6e4be90ec8e6c005c47d1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6103 18288 bytes