Malicious PDF — malware analysis report

Static analysis result for SHA-256 465b0f7266cfb945…

MALICIOUS

PDF

43.7 KB Created: 2021-06-04 04:57:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: adae34c54d262400a24620abe85a6411 SHA-1: 512909862de236b1abfbddc00f1fafde1aa99d4f SHA-256: 465b0f7266cfb9453975c374560364854119779c5f2814335cf15c743953591c
142 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, designed to trick users into interacting with the document. It also hosts a large number of external links, many of which appear to be SEO-optimized for game-related cheats or hacks. The primary malicious URL identified is https://netcdn.online/app/431946152/facebook-roblox-hack-game-hack, which likely serves as a download or redirect point for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • 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
  • 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.online/app/431946152/facebook-roblox-hack-game-hack PDF link annotation
    • http://library.thamrin.ac.id/repository/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/roblox-hack-client_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/coin-master-free-coin-hack_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/coin-master-free-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/how-to-get-free-tokens-in-minecraft-ps4_GM479516143.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-robux-just-click_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/hack-any-roblox-account-using-a-program_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/coin-master-hack-apk-ios_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/how-to-get-free-roblox-hair_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/coin-master-spin-cheat_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/coin-master-free-spins-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/all-links-for-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/how-to-win-attack-madness-in-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 4

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_off00004ee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4EE1 25700 bytes
SHA-256: 41f5cd98c8e53c8ddb40d36ac5fc935b6fd6db7ea5e2680c66b2f0ea4e89ff5e
font_01_sfnt_off0000880f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x880F 18344 bytes
SHA-256: d70e25e84001e20fe04938ea43b004724952aa5c9c52a7090c7ff2f586646f5f

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