Malicious PDF — malware analysis report

Static analysis result for SHA-256 392c2e2f8a64586c…

MALICIOUS

PDF

42.6 KB Created: 2021-05-15 10:45:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: e6078121ce1eb69e9c7b35792d79c481 SHA-1: e7eb574ce555b0cc1dbe1641e55e9fa446234f16 SHA-256: 392c2e2f8a64586c92189e151d0eede6501db89422b6249cfafcc034e332cb2e
182 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are presented as 'game hacks' or generators for in-game currency. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a link farm designed to attract users searching for cheats. The presence of a fake CAPTCHA lure further supports the malicious intent, aiming to trick users into interacting with the malicious content. The document's primary purpose appears to be directing users to potentially malicious sites for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.
  • 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/431946152/roblox-rewards-robux-game-hack PDF link annotation
    • http://hindicenter.com/images/how-to-change-your-name-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://hindicenter.com/images/hack-coin-master-spin-apk_GM406889139.pdfIn PDF document text
    • http://hindicenter.com/images/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • http://hindicenter.com/images/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://hindicenter.com/images/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • http://hindicenter.com/images/free-robux-real-working_GM431946152.pdfIn PDF document text
    • http://hindicenter.com/images/is-roblox-free-on-nintendo-switch_GM431946152.pdfIn PDF document text
    • http://hindicenter.com/images/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://hindicenter.com/images/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://hindicenter.com/images/fighting-free-card-coin-master_GM406889139.pdfIn PDF document text
    • http://hindicenter.com/images/coin-master-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • http://hindicenter.com/images/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://hindicenter.com/images/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://hindicenter.com/images/coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://hindicenter.com/images/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://hindicenter.com/images/links-for-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://hindicenter.com/images/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://hindicenter.com/images/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://hindicenter.com/images/free-spin-card-exchange-coin-master_GM406889139.pdfIn PDF document text
    • http://hindicenter.com/images/coin-master-hack-no-verify_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
font_00_sfnt_off000048a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48A6 25528 bytes
SHA-256: 21e2309b9bf39cb00a3a734f83db1b4c25c6bab50467cec233ffbd3def9634e6
font_01_sfnt_off00008353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8353 18492 bytes
SHA-256: f54db345ef6a05ddcc33e39b82b6da332f4d0f4ab5c2582a6db6f23f2eda51df

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