Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5022a8f6f7c9e54…

MALICIOUS

PDF

45.0 KB Created: 2021-06-11 01:21:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: dcc716622ca664f6c1adffe5dbcf4c6b SHA-1: e1f31fbc0832b50918a08dc9ef6aadffe23974de SHA-256: e5022a8f6f7c9e548b1c3bd0fa74aa0c277c89889253781373bfca8c710c817a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising free game hacks and currency. The primary lure URL is https://netcdn.tw/app/431946152/roblox-everything-free-game-hack, which is part of a chain of redirectors. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering attack designed to lead users to potentially harmful content or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • 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.
  • 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/roblox-everything-free-game-hack In PDF document text
    • http://wadimor.co.id/media/imagesfiles/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/coin-master-free-spin-and-trading-group_GM406889139.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/coin-blogspot_GM406889139.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/john-doe-roblox-hacker_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/withdraw-robux_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/aternos-free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/game-give-free-robux_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/free-roblox-characters_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/is-minecraft-free-on-xbox_GM479516143.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/roblox-script-hack_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/coin-master-free-spin-and-coin-link-app_GM406889139.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/free-robux-generator-no-human-verification-2021_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_off0000531e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x531E 25000 bytes
SHA-256: 34c375ae8d0180116376f8895adbc78571595cf6c1e8adf3cf2c692fd93b6963
font_01_sfnt_off00008b52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B52 18920 bytes
SHA-256: bd341ce83ef2051cf60ec13185bdb6516413b320dc341f73c7c234a68d742042

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