Malicious PDF — malware analysis report

Static analysis result for SHA-256 9010d632b05caf8e…

MALICIOUS

PDF

36.5 KB Created: 2021-07-05 17:20:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 7ecbba0227d632aa89b3d7a105e42737 SHA-1: 5204c56b4bc38bc1fe61103eee1f7e741087507b SHA-256: 9010d632b05caf8e7c60198174d5c4110dbc52a241f128245e5ab6fda04c3325
102 Risk Score

Malware Insights

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

The PDF document contains numerous links, many of which are presented as download opportunities for game-related hacks and free items. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to attract users. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment that it is part of a phishing or malware distribution scheme.

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/406889139/daily-free-spins-coin-master-game-hack
    • https://www.dahu-villa.com.tw/upload/files/roblox-jailbreak-hack-client-download_GM431946152.pdf
    • https://www.dahu-villa.com.tw/upload/files/free-minecraft-coloring-pages_GM479516143.pdf
    • https://www.dahu-villa.com.tw/upload/files/games-on-roblox-where-you-win-a-free-clothes_GM431946152.pdf
    • https://www.dahu-villa.com.tw/upload/files/how-to-hack-roblox-and-get-free-stuff-2021_GM431946152.pdf
    • https://www.dahu-villa.com.tw/upload/files/minecraft-pocket-edition-download-free-pe-calculator_GM479516143.pdf
    • https://www.dahu-villa.com.tw/upload/files/esopera-hack-roblox_GM431946152.pdf
    • https://www.dahu-villa.com.tw/upload/files/how-to-get-minecraft-for-free-on-iphone_GM479516143.pdf
    • https://www.dahu-villa.com.tw/upload/files/how-to-get-free-robux-no-hacks-2021_GM431946152.pdf
    • https://www.dahu-villa.com.tw/upload/files/minecraft-pe-015-0-apk-free-download_GM479516143.pdf
    • https://www.dahu-villa.com.tw/upload/files/coin-master-hack-without-verification-2021_GM406889139.pdf
    • https://www.dahu-villa.com.tw/upload/files/how-to-create-a-minecraft-server-for-free_GM479516143.pdf
    • https://www.dahu-villa.com.tw/upload/files/no-human-verification-hack-for-coin-master_GM406889139.pdf
    • https://www.dahu-villa.com.tw/upload/files/robux-hack-apk-2021_GM431946152.pdf
    • https://www.dahu-villa.com.tw/upload/files/play-roblox-free-online_GM431946152.pdf
    • https://www.dahu-villa.com.tw/upload/files/how-to-have-game-pass-free-in-roblox_GM431946152.pdf
    • https://www.dahu-villa.com.tw/upload/files/pubg-uc-100-bonus_GM1330123889.pdf
    • https://www.dahu-villa.com.tw/upload/files/free-printable-roblox-images_GM431946152.pdf
    • https://www.dahu-villa.com.tw/upload/files/roblox-online-free-no-download_GM431946152.pdf
    • https://www.dahu-villa.com.tw/upload/files/coin-master-free-spins-link-blogspot-today_GM406889139.pdf
    • https://www.dahu-villa.com.tw/upload/files/download-minecraft-free-hiapphere_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000037f6.bin
42c766a62fdf92aad8f66eb679d3bd625e9d5442327f24e93b969945a62bad50
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x37F6 22952 bytes
font_01_sfnt_off00006b5d.bin
e1561e5ad11d6fa371b43628261e275aedbbfff84e2cc2a1b863fefe4a2dbfc2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B5D 18596 bytes