Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f49be75ab032356…

MALICIOUS

PDF

43.1 KB Created: 2021-05-12 14:49:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 1ccea42e5b05e66076ad199f3bb98e87 SHA-1: 681169e4c2a56cab4479f4a7e775fd1c27f16e59 SHA-256: 8f49be75ab032356f0ef669bcd0b169f3136bfe040954030e7c942c4e4acf13b
122 Risk Score

Malware Insights

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

The PDF document contains a lure for a "game hack" generator, directing users to a malicious URL. It also displays a fake CAPTCHA to trick users into interacting with the document, likely to trigger further malicious actions. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to exploit vulnerabilities or trick users into downloading a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/406889139/hack-master-coin-pc-game-hack PDF link annotation
    • http://sdsdar.org/images/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://sdsdar.org/images/card-hack-in-coin-master_GM406889139.pdfIn PDF document text
    • http://sdsdar.org/images/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://sdsdar.org/images/robux-free-c_GM431946152.pdfIn PDF document text
    • http://sdsdar.org/images/free-minecraft-bedrock-server_GM479516143.pdfIn PDF document text
    • http://sdsdar.org/images/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://sdsdar.org/images/free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://sdsdar.org/images/free-vpn-for-minecraft_GM479516143.pdfIn PDF document text
    • http://sdsdar.org/images/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • http://sdsdar.org/images/minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://sdsdar.org/images/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://sdsdar.org/images/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • http://sdsdar.org/images/roblox-games-with-free-radio_GM431946152.pdfIn PDF document text
    • http://sdsdar.org/images/free-t-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://sdsdar.org/images/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://sdsdar.org/images/free-bobux_GM431946152.pdfIn PDF document text
    • http://sdsdar.org/images/coin-master-free-spins-daily-link-game-mod_GM406889139.pdfIn PDF document text
    • http://sdsdar.org/images/free-spins-coin-master-links-thursday-november-28-2021_GM406889139.pdfIn PDF document text
    • http://sdsdar.org/images/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://sdsdar.org/images/how-to-get-free-spins-on-coin-master-game_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_off00004a6a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A6A 24864 bytes
SHA-256: 055da16857b69f0144e921e8f320ba1cc4cd9c648542801147bf5c71cf28cce1
font_01_sfnt_off00008386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8386 19196 bytes
SHA-256: dc5a11f67be0a1030f7fc48cc489eb43c3127d3bef4471dca9e0f89a4316ca43

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