Malicious PDF — malware analysis report

Static analysis result for SHA-256 e80e08439207b6bb…

MALICIOUS

PDF

41.6 KB Created: 2021-05-17 05:00:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9e34ff0c58b8aa646b2d9671e91af9d2 SHA-1: 76bd37904acc93f3b4b328e5e0f597fb298bed89 SHA-256: e80e08439207b6bbaf4c063d2de0588eb1ced24a42ad8ac68423aeb97952b68d
122 Risk Score

Malware Insights

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

The PDF document employs a fake CAPTCHA lure to deceive users into interacting with it, likely to initiate a download or exploit. It contains numerous links to external sites offering game hacks and generators, with a primary URL pointing to 'netcdn.xyz'. While no scripts were directly extracted, the PDF structure and embedded links suggest a potential for JavaScript execution or exploitation to deliver a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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/479516143/minecraft-creative-mode-free-game-hack PDF link annotation
    • http://sbm-nn.ru/images/coin-master-facebook-page_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-32-hack-apk_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/roblox-hack-apk_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/minecraft-pvp-hacks_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/no-human-verification-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-robux-reddit_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/cute-free-roblox-clothes_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/2021-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/minecraft-114-download_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-cheat-codes-free_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/vip-roblox-free_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/best-way-to-get-robux_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-free-cards-link-2021_GM406889139.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_003_off00004882.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4882 24664 bytes
SHA-256: 13b490c06feda5c4d1154d92b9e7bd07cda0adca3314b0e164242067ebf0b7b1
font_01_sfnt_off000080e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80E1 18000 bytes
SHA-256: f6a8cbfed7e544a7ed90cd1995fc8c45102f25219f8fae40911eda120a1a4630

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