Malicious PDF — malware analysis report

Static analysis result for SHA-256 27f7c8f3fd25025d…

MALICIOUS

PDF

35.4 KB Created: 2021-07-02 06:19:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: da6d346eeaba3af293232d2fc14e8c2f SHA-1: 7a28ad29469d7546e3a1158bd41c3aa64c1e09ba SHA-256: 27f7c8f3fd25025d59ba488829ce287c415e2970be33a64c138f5a4e2c8de7df
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that point to a known malicious redirector infrastructure, specifically designed to lure users with promises of free game currency or hacks. The document's content and heuristics strongly indicate a phishing or scam attempt, likely leading to further malicious downloads or credential harvesting. No scripts were extracted from this sample.

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/bux-life-free-robux-codes-game-hack In PDF document text
    • https://encounternepal.com/userfiles/files/dress-roblox-free_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/roblox-free-download_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-roblox-adopt-me-pets_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-village-3_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/rbxoffer-com-free-robux_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-hack-game-download-mod-apk_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-robux-enter-password_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-website_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/hack-client_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/how-to-get-free-followers-on-tiktok-fast_GM835599320.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-free-pin_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-robux-without-verify_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_off0000308d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x308D 23404 bytes
SHA-256: 2e70f4952c05ba72da699b76cc54c795f8317eaea488d7feaf0bba8064d5983b
font_01_sfnt_off00006589.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6589 19012 bytes
SHA-256: 11e0c63b0f7785b7bb6ed7a4e4dddb1283ac4fcc266a9449b723d0fe25a164cb

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