Malicious PDF — malware analysis report

Static analysis result for SHA-256 26dbe72cf15f1122…

MALICIOUS

PDF

47.9 KB Created: 2021-06-08 21:56:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 7400dfabda5175faae625067050a2ddf SHA-1: d53f41ad580de5d7d12aabd0bbd76c5a008efc62 SHA-256: 26dbe72cf15f112204de0fd933ba4b1fdb7d8c9fb67734138e7868cd4bb3ff78
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a phishing lure, specifically a fake CAPTCHA or human verification prompt designed to trick users. It also contains a significant number of external links, forming a link farm, and includes an MFA lure, suggesting an attempt to harvest credentials or session tokens. The presence of embedded URLs and the overall structure strongly indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 6

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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 https://netcdn.tw/app/431946152/hacks-for-roblox-2021-for-mac-game-hack
    • http://lib.bppsdmp.pertanian.go.id/main/repository/free-coins-coin-master-hack_GM406889139.pdf
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/how-to-get-free-robux-2021_GM431946152.pdf
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/get-free-robux-without-doing-anything_GM431946152.pdf
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/how-to-hack-roblox-accounts_GM431946152.pdf
    • http://lib.bppsdmp.pertanian.go.id/main/repository/free-roblox-dominus_GM431946152.pdf
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/how-to-get-minecraft-for-free-on-ps4-2021_GM479516143.pdf
    • http://lib.bppsdmp.pertanian.go.id/main/repository/coin-master-mod-apk-2021_GM406889139.pdf
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/how-to-get-free-robux-from-codes_GM431946152.pdf
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/free-tiktok-fans-and-likes_GM835599320.pdf
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/coinmaster-free-spins-link_GM406889139.pdf
    • http://lib.bppsdmp.pertanian.go.id/main/repository/free-robux-no-verification-no-download_GM431946152.pdf
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/free-minecraft-maps-pe_GM479516143.pdf
    • http://lib.bppsdmp.pertanian.go.id/main/repository/roblox-free-robux-generator-no-survey_GM431946152.pdf
    • http://lib.bppsdmp.pertanian.go.id/main/repository/roblox-free-robux-hack_GM431946152.pdf
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/robloxhacks_GM431946152.pdf
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/roblox-system_GM431946152.pdf
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/coin-master-free-spins-link-ios_GM406889139.pdf
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/coin-master-daily-free-spin-and-coin_GM406889139.pdf
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/how-to-hack-any-roblox-account_GM431946152.pdf
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/free-robux-glitch-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005122.bin
0fe381c2daf91eb8b6bcbeb89575674493541c26ca6f8fe8de8db2ff238093eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5122 24872 bytes
font_01_sfnt_off00008945.bin
450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8945 5696 bytes
font_02_sfnt_off00009657.bin
539da9b3cc7997ed6770f607d9da2f4070395156e820fab4c411aeea56b946f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9657 18944 bytes

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