Malicious PDF — malware analysis report

Static analysis result for SHA-256 d01e95290884b348…

MALICIOUS

PDF

45.8 KB Created: 2021-06-07 20:05:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: de4c311db8be3e8326ee8f186483780b SHA-1: b651ccf83aa9ac279346254d8149917cb21d8c2f SHA-256: d01e95290884b348de979cf73dbfa6ab1de07add0a3f0baaeeb1854d1f2153b6
122 Risk Score

Malware Insights

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

The PDF contains multiple links, including one pointing to a 'free generator / game hack' lure, and exhibits a fake CAPTCHA heuristic. This suggests the document is designed to trick users into clicking malicious links, likely for phishing or to download further malware. No scripts were extracted, but the presence of embedded URIs and the fake CAPTCHA strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/hacking-roblox-fnaf-rp-game-hack PDF link annotation
    • http://www.sfakia-online.com/images/how-do-i-get-tiktok-for-free_GM835599320.pdfIn PDF document text
    • http://www.sfakia-online.com/images/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://www.sfakia-online.com/images/how-to-make-a-private-server-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://www.sfakia-online.com/images/cmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.sfakia-online.com/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.sfakia-online.com/images/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • http://www.sfakia-online.com/images/free-pc-games-like-roblox_GM431946152.pdfIn PDF document text
    • http://www.sfakia-online.com/images/free-roblox-website_GM431946152.pdfIn PDF document text
    • http://www.sfakia-online.com/images/best-tricks-co-robux_GM431946152.pdfIn PDF document text
    • http://www.sfakia-online.com/images/free-robux-obby_GM431946152.pdfIn PDF document text
    • http://www.sfakia-online.com/images/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://www.sfakia-online.com/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://www.sfakia-online.com/images/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://www.sfakia-online.com/images/free-foxy-food-coin-master_GM406889139.pdfIn PDF document text
    • http://www.sfakia-online.com/images/red-boy-hack-roblox-download_GM431946152.pdfIn PDF document text
    • http://www.sfakia-online.com/images/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • http://www.sfakia-online.com/images/will-minecraft-dungeons-be-free_GM479516143.pdfIn PDF document text
    • http://www.sfakia-online.com/images/if-you-delete-minecraft-can-you-redownload-it-for-free_GM479516143.pdfIn PDF document text
    • http://www.sfakia-online.com/images/minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://www.sfakia-online.com/images/robux-gift-card-free_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_004_off0000509b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x509B 27516 bytes
SHA-256: 47f15a5cd27b9398f0227dc647349c04e0691af656acc3d37e5a2ef1e6b8ba1d
font_01_sfnt_off00008e83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E83 18932 bytes
SHA-256: 4bdcb1b125f32ae9813fd117a1b10b0385ff0983e26d907520159c315115a2e7

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