Malicious PDF — malware analysis report

Static analysis result for SHA-256 291986b81dab852a…

MALICIOUS

PDF

42.1 KB Created: 2021-05-19 18:41:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d395f94f645ff3f8b5bac6d02ba1a8f7 SHA-1: 7e64b46dead7be706897ad0f6d6cd133976cc797 SHA-256: 291986b81dab852a0e3e809299216403a78da532c2d8be10f536feb2ff183e2c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that are designed to lure users into clicking on them by promising game hacks or free currency. The primary link, https://netcdn.xyz/app/406889139/coin-master-spin-blogspot-game-hack, is identified as a high-risk lure. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a phishing or social engineering attack aimed at driving users to malicious sites, likely to download further malware. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • 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.
  • 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/coin-master-spin-blogspot-game-hack PDF link annotation
    • http://zagi.hr/files/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.zagi.hr/files/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/earn-points-for-robux_GM431946152.pdfIn PDF document text
    • https://www.zagi.hr/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://zagi.hr/files/free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/free-robux-no-download_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • https://www.zagi.hr/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • https://www.zagi.hr/files/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • https://www.zagi.hr/files/daily-coin-master-link_GM406889139.pdfIn PDF document text
    • http://zagi.hr/files/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • https://www.zagi.hr/files/what-is-a-robux_GM431946152.pdfIn PDF document text
    • https://www.zagi.hr/files/john-doe-roblox-hacker_GM431946152.pdfIn PDF document text
    • https://www.zagi.hr/files/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/free-minecraft-website_GM479516143.pdfIn PDF document text
    • http://zagi.hr/files/coin-master-free-spin-sites_GM406889139.pdfIn PDF document text
    • https://www.zagi.hr/files/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • http://zagi.hr/files/how-to-get-more-robux_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_off00004929.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4929 25044 bytes
SHA-256: b93cd7a70be174366f1a3e8a07254a51d02c03e58fde30df1534dbe6c76cc818
font_01_sfnt_off00008232.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8232 18300 bytes
SHA-256: da6108506d645fcbe3414e0c69cdcf67670a59a1c8ef58446631e8e12bd9067e

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