Malicious PDF — malware analysis report

Static analysis result for SHA-256 3de4d703a0f6b8d2…

MALICIOUS

PDF

34.1 KB Created: 2021-07-04 18:15:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: c563c60d27c15032d07cff95bb0deb02 SHA-1: 0e83dd73068b080ad86df125b2eba9c62a52fc54 SHA-256: 3de4d703a0f6b8d21f4154042ee46558d345b826c0cf7aaf145596d17821115c
102 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are presented as PDF files with titles related to game cheats and hacks. One prominent URL, http://netcdn.tw/app/479516143/minecraft-bedrock-download-pc-free-game-hack, directly suggests a download lure. The ML classifier also strongly flagged this PDF as malicious, indicating a high likelihood 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/479516143/minecraft-bedrock-download-pc-free-game-hack PDF link annotation
    • https://cnc-xinrong.com.tw/image/data/files/como-ser-hacker-en-roblox-100-real_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/minecraft-cheats-pc-2021_GM479516143.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/free-minecraft-java-edition_GM479516143.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/100-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/robux_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/coin-master-daily-free-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/coin-master-hack-download-apk_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/how-to-get-free-admin-in-roblox-on-all-games_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/how-to-hack-roblox-sword-fight-on-the-heights_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/how-to-hack-free-robux-on-ios_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/free-robux-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/aimbot-download-roblox_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/tiktok-free-download-for-windows-10_GM835599320.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/minecraft-free-unblocked_GM479516143.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/free-roblox-unpatchable-script-execiter_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/roblox-how-to-hack-your-account-back_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002efb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EFB 22260 bytes
SHA-256: 8d48705bb3b22d04a22d93bab774ebc45a3f785886baab1bb6b8a9724dca96f7
font_01_sfnt_off00006025.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6025 19120 bytes
SHA-256: 405e75afb82730a1b0b0ee7d31da895580c70361605c23f6ce3b77b4fd1c25f4

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