Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6ddf6ae324320e1…

MALICIOUS

PDF

42.8 KB Created: 2021-05-13 15:01:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3f5718643d7d2850f97fc3d615b001ad SHA-1: 895158116c58918848969ea005b669791b41840f SHA-256: c6ddf6ae324320e1ee8cc93cf19e6fc3293598ab28d886fc5d940d2cc08b38c0
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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/431946152/who-to-get-free-robux-game-hack PDF link annotation
    • http://wsit.at/images/coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://wsit.at/images/haktutsin-2021-09-coinmaster50freespinandcoinlinkhtml-m-1_GM406889139.pdfIn PDF document text
    • http://wsit.at/images/coin-master-hacks-for-free-spins_GM406889139.pdfIn PDF document text
    • http://wsit.at/images/free-spin-coin-master-hacktoman_GM406889139.pdfIn PDF document text
    • http://wsit.at/images/coin-master-mod-apk-unlimited-spin-download-free-full-version_GM406889139.pdfIn PDF document text
    • http://wsit.at/images/coin-master-free-2021_GM406889139.pdfIn PDF document text
    • http://wsit.at/images/offers-to-complete-and-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://wsit.at/images/minecraft-115-2-hacks_GM479516143.pdfIn PDF document text
    • http://wsit.at/images/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://wsit.at/images/xray-mod-minecraft-114_GM479516143.pdfIn PDF document text
    • http://wsit.at/images/free-bedrock-minecraft_GM479516143.pdfIn PDF document text
    • http://wsit.at/images/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://wsit.at/images/roblox-hacking-website_GM431946152.pdfIn PDF document text
    • http://wsit.at/images/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • http://wsit.at/images/can-you-really-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://wsit.at/images/free-spins-coin-master-2021-today_GM406889139.pdfIn PDF document text
    • http://wsit.at/images/coin-master-rewards-app_GM406889139.pdfIn PDF document text
    • http://wsit.at/images/roblox-free-accessories_GM431946152.pdfIn PDF document text
    • http://wsit.at/images/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://wsit.at/images/how-to-hack-roblox-games_GM431946152.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_off000048b1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48B1 25556 bytes
SHA-256: c127bae022d7d9d3c988ed0e21d4bbd342b5466834f8a077fd6217fe677757c6
font_01_sfnt_off0000845e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x845E 18484 bytes
SHA-256: 7ba6f7de64c6d8ae6f5469fb20d9bd46bb355649f5c0a9ce8a2cee34149577d7

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