Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e6b580a4a093862…

MALICIOUS

PDF

44.1 KB Created: 2021-06-10 14:42:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 21b659e9f0759c9100fb4dbcc6e4f2dc SHA-1: 21b6519c448e6f71079700687d4ab604e3155725 SHA-256: 9e6b580a4a093862f6f9431e701dc7cec2421a5ceeec7b4ef5dde7ad064754e1
200 Risk Score

Malware Insights

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

The PDF document contains a lure for a 'free generator / game hack' and displays a fake CAPTCHA to trick users into interacting with malicious links. The embedded URLs, such as 'https://netcdn.tw/app/431946152/to-to-hack-robux-using-script-game-hack', are known to lead to malicious redirectors. The document's structure and content strongly suggest it is designed to deliver a second-stage payload or lead the user to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/to-to-hack-robux-using-script-game-hack In PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-free-shield_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/how-to-get-more-robux_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/minecraft-wurst-hacked-client_GM479516143.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-roblox-outfits_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/roblox-game-free-download_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/spin-coin-master_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/get-free-robux-info_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-hack-2021-free_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/rbx-hut_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/download-hacked-games-coin-master_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-robux-no-verification-required_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/hack-a-game_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-hack-pc_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_off00005036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5036 24092 bytes
SHA-256: 86b9ca5506d8b1610248663a2d270a08476f70f3d00e283e98fceca389e79365
font_01_sfnt_off0000871a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x871A 19120 bytes
SHA-256: ac52e071393abc6c53c5e0f1ef1379bcfc4f6ff5aef3a701e82a1608cbeb8d61

Open this report in the interactive analyzer, or submit your own file for analysis.