Malicious PDF — malware analysis report

Static analysis result for SHA-256 45af165ef022db34…

MALICIOUS

PDF

35.3 KB Created: 2021-06-18 08:20:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: d3c60f82cfa4f837dc0de0e56367b939 SHA-1: cd980701b9c466dce25d5e81b35c3f18bf455e14 SHA-256: 45af165ef022db345c3d87e906a18f0de7c3cc3655aaf44dc1b0ed466516f665
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirectors and other PDF files, masquerading as game hacks and generators. The ML classifier and specific heuristics indicate malicious intent, likely to lead users to further malicious content or downloads. Although no scripts were explicitly extracted, the embedded links and document structure strongly suggest a phishing or malware distribution attempt.

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.co/app/431946152/free-roblox-uncopylocked-games-game-hack In PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/free-roblox-map-scanner_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/coin-master-hack-tool-access-online-generator_GM406889139.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/how-to-use-wurst_GM479516143.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/http-coin-master-hack-club_GM406889139.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/minecraft-jar-free_GM479516143.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/code-roblox-robux-free_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/try-minecraft-free_GM479516143.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/coin-master-free-gift-link-2021_GM406889139.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/roblox-hacks-com_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/coin-master-free-spins-april-2021_GM406889139.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/earn-robux-today-earn-robux-today_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/minecraft-java-code-free_GM479516143.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/how-to-get-a-free-seer-in-roblox-mm2_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/can-i-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/how-can-i-get-minecraft-for-free_GM479516143.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_off0000312e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x312E 22404 bytes
SHA-256: 96bcd1a6d08ddaeb2cb232e27c6a32e6afc411fa7da4dca1027dbe1be4e79409
font_01_sfnt_off0000634b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x634B 19608 bytes
SHA-256: e0b04b972848551fa2450e47f12488b6718f01ef0d1e55937dd09abac86b1d07

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