Malicious PDF — malware analysis report

Static analysis result for SHA-256 f65d80eddd7bdbb5…

MALICIOUS

PDF

34.4 KB Created: 2021-07-06 03:14:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 3715c30702a7c4fbb9150404552b1e31 SHA-1: c5e97dabbbcfa4c8236086090bbaa4d68d317bc1 SHA-256: f65d80eddd7bdbb503d23f2d7936c6aa8bc9a747bb049fd12416eadb2e92ff6e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lead to known malicious redirectors, specifically promoting game hacks and free spins. The primary lure is the URL http://netcdn.tw/app/406889139/get-free-spins-in-coin-master-game-hack, which is associated with a 'free generator / game hack' scheme. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering attack aimed at redirecting users to potentially harmful content or further malware downloads.

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/get-free-spins-in-coin-master-game-hack In PDF document text
    • https://hotelartskathmandu.com/userfiles/files/confuse-roblox-hack_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/auto-hockey-roblox-piano-hack_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/descargar-hacks-para-roblox-2021_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/pokemon-go-free-pokemon_GM1094591345.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/coin-master-tricks_GM406889139.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/coin-master-hack-tool-v1-9-apk_GM406889139.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/coin-master-hack-without-verification-ios_GM406889139.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/blackberry-hack-roblox_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/roblox-hack-client_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/free-tiktok-fans-and-likes_GM835599320.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/coin-master-free-spins-link-2021-haktuts_GM406889139.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/robux-redeem_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/ways-to-get-free-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
font_00_sfnt_off000030ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30ED 22792 bytes
SHA-256: d0bc3f8c12709770e81e73b9206dcfb7a9c82f1f3fa8b7aeec8b1360a8c89ae5
font_01_sfnt_off000063f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63F5 18176 bytes
SHA-256: 40bd2a423e8c3e22f2455c3bf096c64e087039c583c2df40abec99adf6858c95

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