Malicious PDF — malware analysis report

Static analysis result for SHA-256 de7cc010fa1358ee…

MALICIOUS

PDF

44.5 KB Created: 2021-06-02 13:26:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 037454a349a82bab001bda963896acc9 SHA-1: b67bb13ca00c009624f6309d52e86492452f623f SHA-256: de7cc010fa1358ee666fbd48e8a5cb2008a8db00f071fe7e1677782a7cfe8b34
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was identified as malicious by an ML classifier and exhibits characteristics of a fake CAPTCHA lure, designed to trick users into downloading further content. The document contains numerous embedded URLs pointing to various 'hack' and 'free' related content, suggesting a phishing or scam attempt. No scripts were extracted, but the presence of external URIs indicates a potential download or redirection to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.xyz/app/431946152/roblox-free-headphones-code-game-hack PDF link annotation
    • http://sbm-nn.ru/images/coin-master-hack-september-2021_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/hack-coin-master-spin_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/roblox-free-hair-codes_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/easy-robux-today-com_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-free-spins-link-haktuts_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-daily-free-coins-link-today_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/roblox-cheat-robux_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/minecraft-115-2-hacks_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/robux-free-com_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-robux-co_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/minecraft-java-edition-free-trial_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/tiktok-unlimited-free-trials_GM835599320.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051dd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51DD 24472 bytes
SHA-256: 08cc3cfb97e8bb21b056614862199b6146eb45bea9e9ab5a5819d4ab13786680
font_01_sfnt_off000089ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89EF 18692 bytes
SHA-256: b26cfe066732e6f08ad759826c7c8ea352b1036613aefc64d9fe66773c86d02e

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