Malicious PDF — malware analysis report

Static analysis result for SHA-256 519656f8c8c175a7…

MALICIOUS

PDF

47.7 KB Created: 2021-05-15 15:11:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 717087ac655e162388e77f6ad647a9e8 SHA-1: f5ae80d21aede3f15dff51a3a078254425e1145a SHA-256: 519656f8c8c175a796efe4b99566e6d6a5b6a92fe43aced2c536d2158f9f0b44
122 Risk Score

Malware Insights

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

The PDF document contains a lure for game hacks and free currency, presenting a fake CAPTCHA to trick users into interacting with malicious links. The primary link, https://netcdn.xyz/app/431946152/giftrobux-com-generator-game-hack, is likely to lead to further malicious content or downloads. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to exploit vulnerabilities or redirect the user to a malicious site, potentially leading to client execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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/giftrobux-com-generator-game-hack PDF link annotation
    • http://www.agri-tech.com.au/images/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://www.agri-tech.com.au/images/coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.agri-tech.com.au/images/coin-master-hack-mod-apk-35-8_GM406889139.pdfIn PDF document text
    • http://www.agri-tech.com.au/images/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://www.agri-tech.com.au/images/coin-master-hack-tool-ios_GM406889139.pdfIn PDF document text
    • http://www.agri-tech.com.au/images/coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://www.agri-tech.com.au/images/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://www.agri-tech.com.au/images/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://www.agri-tech.com.au/images/coun-master_GM406889139.pdfIn PDF document text
    • http://www.agri-tech.com.au/images/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.agri-tech.com.au/images/free-robux-site_GM431946152.pdfIn PDF document text
    • http://www.agri-tech.com.au/images/coin-master-for-pc-free-download_GM406889139.pdfIn PDF document text
    • http://www.agri-tech.com.au/images/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://www.agri-tech.com.au/images/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.agri-tech.com.au/images/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • http://www.agri-tech.com.au/images/all-coin-master-spin-link-and-free-download_GM406889139.pdfIn PDF document text
    • http://www.agri-tech.com.au/images/coin-master-free-chest-link_GM406889139.pdfIn PDF document text
    • http://www.agri-tech.com.au/images/how-to-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.agri-tech.com.au/images/coin-master-free-spin-and-coins-fbid-links_GM406889139.pdfIn PDF document text
    • http://www.agri-tech.com.au/images/free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000485d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x485D 28928 bytes
SHA-256: 9dbc1232a6572f2c98a9f61f78489633b8ae03c9fe1a1fdb56d120327598c8b8
font_01_sfnt_off00008a73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A73 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_02_sfnt_off0000971a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x971A 18564 bytes
SHA-256: d4fe2e40c8749f3e28ba2f676cfcb3a45d14d1e884f99ef521d4b9bf9891a09b

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