Malicious PDF — malware analysis report

Static analysis result for SHA-256 115fee3db836efce…

MALICIOUS

PDF

34.8 KB Created: 2021-07-03 20:01:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: d6604920ff5f8348e37e592b3476195a SHA-1: 0f0813e1b12b188233ddaa887adae27832184c03 SHA-256: 115fee3db836efce10606c10b3638fed243b9d7380246dcc5ff8c34fcd8d7c7b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and sites offering game hacks and cheats, such as 'coin-master-hack-2021-game-hack'. The presence of these links, combined with the ML classifier flagging it as malicious, strongly suggests a social engineering lure designed to lead users to potentially harmful content or phishing sites. No scripts were extracted, but the document's structure and embedded links indicate a clear intent to redirect users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/coin-master-hack-2021-game-hack In PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/cheapest-pubg-uc_GM1330123889.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/is-it-possible-for-someone-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/bux-gg-robux-free_GM431946152.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/xray-hack_GM479516143.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/coin-master-free-2021_GM406889139.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/roblox-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/robux-hack-download-2021_GM431946152.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/roblox-50-robux-free_GM431946152.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/coin-master-hack-spin-link_GM406889139.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/hack-coin-master-app-ios_GM406889139.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/roblox-games-with-free-boombox-2021_GM431946152.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/hacker-shirt-for-free-roblox_GM431946152.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/minecraft-pe-free-ios_GM479516143.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/roblox-free-robux-codes-card_GM431946152.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/free-meme-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/free-roblox-app_GM431946152.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/how-to-get-robux-for-free-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
font_00_sfnt_off00003211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3211 22788 bytes
SHA-256: 86e710cdcba62f64f54caff08bc78d81da437452b9ff1a62d3cf76212e14ad35
font_01_sfnt_off00006501.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6501 18408 bytes
SHA-256: 8438728008f6ab05b5c9a65d4eeb1f2e5c23a436eadc11c6e76328f72b7d7fb7

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