Malicious PDF — malware analysis report

Static analysis result for SHA-256 03f1cfa55a2393af…

MALICIOUS

PDF

42.0 KB Created: 2021-06-13 19:38:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: d6b9ae0de77d981130925b91448be463 SHA-1: a78aa3756377d57477dd1422e74da680dc7b3d56 SHA-256: 03f1cfa55a2393af8bf85d4cabeb951de484a1907fb5bad0bee141f85a7c2579
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector. The primary lure appears to be a 'Coin Master Spin Pattern Game Hack' which redirects to the malicious URL http://netcdn.co/app/406889139/coin-master-spin-pattern-game-hack. This suggests the document is designed to trick users into visiting potentially harmful sites, likely for further exploitation or malware delivery. No scripts were extracted, but the embedded URLs and redirector behavior are strong indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/406889139/coin-master-spin-pattern-game-hack In PDF document text
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/roblox-mac-cheat-engine_GM431946152.pdfIn PDF document text
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/moon-active-games_GM406889139.pdfIn PDF document text
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/free-stuff-in-roblox-catalog-2021_GM431946152.pdfIn PDF document text
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/roblox-devil_GM431946152.pdfIn PDF document text
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/free-robux-generator_GM431946152.pdfIn PDF document text
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/free-spins-for-coin-master-that-work_GM406889139.pdfIn PDF document text
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/free-roblox-usernames-and-passwords_GM431946152.pdfIn PDF document text
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/coin-master-free-spins-2021-blogspot_GM406889139.pdfIn PDF document text
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/minecraft-java-account-free_GM479516143.pdfIn PDF document text
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/free-daily-coin-master-coins_GM406889139.pdfIn PDF document text
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/roblox-microsoft-rewards_GM431946152.pdfIn PDF document text
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/minecraft-pe-free-download_GM479516143.pdfIn PDF document text
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/free-robux-legit_GM431946152.pdfIn PDF document text
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/how-to-get-bc-on-roblox-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
stream_003_off00004b65.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B65 24620 bytes
SHA-256: f7786d018cd1242174906413ffe44f65409cd0ed5a96141f57668ef2d3cfe00f
font_01_sfnt_off0000832a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x832A 17876 bytes
SHA-256: bd22fd35e13567494ff4a803842d6b5fa952e975cd9e2293b3775db85ba13e50

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