Malicious PDF — malware analysis report

Static analysis result for SHA-256 b499fb9e9df7952b…

MALICIOUS

PDF

34.4 KB Created: 2021-06-19 19:45:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: eec63905e24eededbeb18fa82646f39b SHA-1: cfb1a50e23177f3069c38ec95618ba9f00170aaa SHA-256: b499fb9e9df7952b42584ce5cc9f3d148dca75259326d1571700866bceb588ce
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document employs a lure of free game hacks and currency to trick users into clicking malicious links. It contains multiple embedded URLs, including one pointing to a known malicious redirector infrastructure at http://netcdn.co/app/431946152/blue-hair-roblox-free-game-hack. The document also links to other PDFs hosted on an IP address, suggesting a chain of malicious content delivery. No scripts were extracted, but the document's structure and embedded links strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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/blue-hair-roblox-free-game-hack In PDF document text
    • http://103.40.122.33/akasia/repository/is-minecraft-education-edition-free_GM479516143.pdfPDF link annotation
    • http://103.40.122.33/akasia/repository/pubg-uc-telegram_GM1330123889.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-glitch-for-free-items_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-mod-hack-robux_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/hack-roblox-account-to-get-password_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-download-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-grab-the-child-hacks_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/advertise-for-free-robux_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-get-free-gamepass-on-roblox_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-hack-your-old-account-back-on-roblox_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-get-free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/real-roblox-lumber-tycoon-2-hack-download-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-hack-any-roblox-game-using-javascript_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_off00003018.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3018 22372 bytes
SHA-256: 31bbe5746727b09d0aa0d87f8bd8039b06c83afb18294843eeda581a557d4695
font_01_sfnt_off000061c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61C6 18912 bytes
SHA-256: 472664de25f71f659965c4632ad0f5aa0d2bd4e50bb880a536b18889189cbf8a

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