Malicious PDF — malware analysis report

Static analysis result for SHA-256 be1f26935d612869…

MALICIOUS

PDF

47.9 KB Created: 2021-06-08 16:36:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 478ffd5456fe28de472dcb724084d82d SHA-1: e5e866c1057a435ab9b47051ab8d27e2663bd903 SHA-256: be1f26935d612869d93dc5857e178b84f8430550eec1ab6908b2ffacb500fff9
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure designed to trick users into clicking embedded links. The primary link directs to a site offering 'free Roblox accounts' and 'game hacks', suggesting a phishing or scam attempt. No scripts were extracted, but the presence of multiple malicious URLs and the fake CAPTCHA heuristic strongly indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

Heuristics 4

  • 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.tw/app/431946152/free-roblox-accounts-with-100-days-game-hack PDF link annotation
    • https://audev.com/images/how-to-hack-coin-master-pc_GM406889139.pdfIn PDF document text
    • https://audev.com/images/password-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://audev.com/images/coin-master-hack-online-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • https://www.audev.com/images/free-robux-please_GM431946152.pdfIn PDF document text
    • https://www.audev.com/images/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.audev.com/images/coin-master-apk-hack_GM406889139.pdfIn PDF document text
    • https://audev.com/images/roblox-song-code-for-cheat-codes_GM431946152.pdfIn PDF document text
    • https://audev.com/images/coin-master-hack-app-download-free_GM406889139.pdfIn PDF document text
    • https://audev.com/images/mcpe-download_GM479516143.pdfIn PDF document text
    • https://audev.com/images/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://audev.com/images/coin-hackhub-coin-master_GM406889139.pdfIn PDF document text
    • https://audev.com/images/coin-master-spin-link-free-download_GM406889139.pdfIn PDF document text
    • https://www.audev.com/images/roblox-hack-client_GM431946152.pdfIn PDF document text
    • https://audev.com/images/robux-hack-pastebin-explication_GM431946152.pdfIn PDF document text
    • https://audev.com/images/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
    • https://www.audev.com/images/roblox-cheat-codes-for-money-on-jail-tycoon_GM431946152.pdfIn PDF document text
    • https://www.audev.com/images/minecraft-skins-download-free_GM479516143.pdfIn PDF document text
    • https://www.audev.com/images/coin-master-spin-hack-link_GM406889139.pdfIn PDF document text
    • https://www.audev.com/images/get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.audev.com/images/tiktok-like-bot-free_GM835599320.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051ae.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51AE 24712 bytes
SHA-256: f1ac910e6e14e767371bc8ab9405d21c9ad480fd21c1e42a2a3c60c595e3d272
font_01_sfnt_off00008ae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AE3 2824 bytes
SHA-256: 94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4
font_02_sfnt_off00009491.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9491 19528 bytes
SHA-256: a1c67abd1fac0d4b11832a561833d81d8b7d222409c82b2865619a08428f5ffb

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