Malicious PDF — malware analysis report

Static analysis result for SHA-256 cee228c9af183d55…

MALICIOUS

PDF

49.2 KB Created: 2021-06-03 06:09:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 5cd17f87756b266fd52aabf6b0c6145f SHA-1: d951f985f97e4b2cb9b5ead577795d542ad64a55 SHA-256: cee228c9af183d55dd1156f754b3ada119aa9b8d4de6440f1392c3a5dd62e9fe
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirector infrastructure, specifically promoting "game hacks" and "free spins" for popular mobile games. The primary malicious URL identified is https://netcdn.online/app/406889139/coin-master-free-spins-promo-code-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a lure designed to redirect users to potentially harmful content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.online/app/406889139/coin-master-free-spins-promo-code-game-hack In PDF document text
    • https://www.jonaled.com/uploaded_files/userfiles/files/coin-master-link-today_GM406889139.pdfIn PDF document text
    • https://www.jonaled.com/uploaded_files/userfiles/files/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://www.jonaled.com/uploaded_files/userfiles/files/free-roblox-pin-codes_GM431946152.pdfIn PDF document text
    • https://www.jonaled.com/uploaded_files/userfiles/files/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://www.jonaled.com/uploaded_files/userfiles/files/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • https://www.jonaled.com/uploaded_files/userfiles/files/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.jonaled.com/uploaded_files/userfiles/files/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • https://www.jonaled.com/uploaded_files/userfiles/files/free-accessories-roblox_GM431946152.pdfIn PDF document text
    • https://www.jonaled.com/uploaded_files/userfiles/files/impact-minecraft-hack_GM479516143.pdfIn PDF document text
    • https://www.jonaled.com/uploaded_files/userfiles/files/todays-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • https://www.jonaled.com/uploaded_files/userfiles/files/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://www.jonaled.com/uploaded_files/userfiles/files/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • https://www.jonaled.com/uploaded_files/userfiles/files/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • https://www.jonaled.com/uploaded_files/userfiles/files/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://www.jonaled.com/uploaded_files/userfiles/files/free-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • https://www.jonaled.com/uploaded_files/userfiles/files/free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://www.jonaled.com/uploaded_files/userfiles/files/rewardex-robux_GM431946152.pdfIn PDF document text
    • https://www.jonaled.com/uploaded_files/userfiles/files/minecraft-pc-download-free-full-version_GM479516143.pdfIn PDF document text
    • https://www.jonaled.com/uploaded_files/userfiles/files/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.jonaled.com/uploaded_files/userfiles/files/minecraft-pe-free-ios_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005435.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5435 28068 bytes
SHA-256: d4c806ac8ec95fc5cb91b7d173fd856af14867de4f8cb83246d5f37c423ca6ac
font_01_sfnt_off00009393.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9393 2812 bytes
SHA-256: fc92a80cefddbcc51cb4ecd7284aa73b746cbd66adcf1d96110f0323ec06b51f
font_02_sfnt_off00009d34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D34 18476 bytes
SHA-256: dc3ef91c42b56b19e880a129857b9cc4209ff723fc15082788877c1745c42c0a

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