Malicious PDF — malware analysis report

Static analysis result for SHA-256 4179718a6b39f84b…

MALICIOUS

PDF

42.3 KB Created: 2021-05-12 23:31:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: fc6ed6809871a50704a4ba662448bd36 SHA-1: 93962a3e1e26e696f388f24cab34da5aa8c36cf9 SHA-256: 4179718a6b39f84b7869765bf22461eda267de28be47a818d5c8e86cae6c161b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting a 'game hack' or 'free spins' lure. The primary redirector URL is https://netcdn.xyz/app/406889139/coinmasterfreespinlink-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering attack aimed at tricking users into visiting malicious sites, likely to download further malware or engage in phishing. The ML classifier also flagged this document with high confidence.

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 https://netcdn.xyz/app/406889139/coinmasterfreespinlink-game-hack In PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/girl-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/coin-master-hack-apk-2021_GM406889139.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/coin-master-hack-tool-for-pc_GM406889139.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/roblox-girl_GM431946152.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/coin-master-hack-pc_GM406889139.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/coin-master-bonus_GM406889139.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/hack-para-coin-master-singapore_GM406889139.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/app-master_GM406889139.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/cute-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/free-coin-master-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/coin-master-hack-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/how-to-hack-someones-minecraft-account_GM479516143.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a0f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A0F 24948 bytes
SHA-256: 8e3a67e0febc0acfb8dc9c55a722812eea9db5186104a02ed7dcf46f8eda0c20
font_01_sfnt_off00008343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8343 18224 bytes
SHA-256: 5ac1ce2ac88e7b98134a23e8a83b406c8e40c127b2dbab09a4edbea00c7c47cb

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