Malicious PDF — malware analysis report

Static analysis result for SHA-256 449ca4643749ec23…

MALICIOUS

PDF

42.3 KB Created: 2021-05-15 11:39:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0a3b3f439f517a552583955a84151afb SHA-1: dbcdc1748e8c93cb929b6ff1628d5b40a4106b35 SHA-256: 449ca4643749ec233672f256ef09f3f268c2e0a0f958eff499e9fe5e0e148393
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically disguised as 'free generator' or 'game hack' lures. The embedded URLs, such as 'https://netcdn.xyz/app/406889139/hack-coin-master-apk-ios-game-hack', are designed to trick users into downloading potentially malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a malicious redirector chain.

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/hack-coin-master-apk-ios-game-hack In PDF document text
    • http://lechia-sedziszow.pl/images/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • http://lechia-sedziszow.pl/images/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • http://lechia-sedziszow.pl/images/free-coins-coin-master-link-today_GM406889139.pdfIn PDF document text
    • http://lechia-sedziszow.pl/images/minecraft-font-free_GM479516143.pdfIn PDF document text
    • http://lechia-sedziszow.pl/images/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • http://lechia-sedziszow.pl/images/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://lechia-sedziszow.pl/images/hack-coin-master-download-ios_GM406889139.pdfIn PDF document text
    • http://lechia-sedziszow.pl/images/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • http://lechia-sedziszow.pl/images/coin-master-free-spins-generator-no-verification_GM406889139.pdfIn PDF document text
    • http://lechia-sedziszow.pl/images/hack-the-game-coin-master_GM406889139.pdfIn PDF document text
    • http://lechia-sedziszow.pl/images/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • http://lechia-sedziszow.pl/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://lechia-sedziszow.pl/images/roblox-com-free-play_GM431946152.pdfIn PDF document text
    • http://lechia-sedziszow.pl/images/free-robux-ad_GM431946152.pdfIn PDF document text
    • http://lechia-sedziszow.pl/images/robux-sign_GM431946152.pdfIn PDF document text
    • http://lechia-sedziszow.pl/images/coin-master-reward-link_GM406889139.pdfIn PDF document text
    • http://lechia-sedziszow.pl/images/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lechia-sedziszow.pl/images/minecraft-hax-download-no-virus_GM479516143.pdfIn PDF document text
    • http://lechia-sedziszow.pl/images/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lechia-sedziszow.pl/images/robloxfun-com-generator_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_off000047e6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47E6 26684 bytes
SHA-256: 69c18050aa412a9ce77e52bf152d28b6c8b3b8b1d470778afdd1df44f09a98a8
font_01_sfnt_off00008450.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8450 17892 bytes
SHA-256: db4cb0e5038e40aae5db0274b23e1c53a74243cd1ac5b16be32cf562ede0c44a