Malicious PDF — malware analysis report

Static analysis result for SHA-256 b273a2b9a5df7f4f…

MALICIOUS

PDF

41.8 KB Created: 2021-05-16 14:52:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d1e5579d18dcca54b02aff5639958a81 SHA-1: 1f72871eba102299058da8fe42a83526e454a10e SHA-256: b273a2b9a5df7f4faba20a32732d02c37bdfab9741340c7e234c489f0b059ac5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically promoting 'game hacks' and 'generators'. The primary malicious URL identified is https://netcdn.xyz/app/406889139/kachifpro-game-hack, which is presented as a lure for free game currency or hacks. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a redirection-based attack designed to lead users to potentially harmful content or further malicious downloads.

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/kachifpro-game-hack In PDF document text
    • https://wandpiraten.de/images/roblox-generator_GM431946152.pdfIn PDF document text
    • https://wandpiraten.de/images/free-roblox-website_GM431946152.pdfIn PDF document text
    • https://wandpiraten.de/images/how-do-you-earn-robux_GM431946152.pdfIn PDF document text
    • https://wandpiraten.de/images/coin-master-free-cards-link-2021-today_GM406889139.pdfIn PDF document text
    • https://wandpiraten.de/images/roblox-sign-in-free_GM431946152.pdfIn PDF document text
    • https://wandpiraten.de/images/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • https://wandpiraten.de/images/coin-master-online-hack-tool_GM406889139.pdfIn PDF document text
    • https://wandpiraten.de/images/how-to-download-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • https://wandpiraten.de/images/robux-page_GM431946152.pdfIn PDF document text
    • https://wandpiraten.de/images/free-links-coin-master_GM406889139.pdfIn PDF document text
    • https://wandpiraten.de/images/coin-master-free-spin-and-trading_GM406889139.pdfIn PDF document text
    • https://wandpiraten.de/images/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • https://wandpiraten.de/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://wandpiraten.de/images/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://wandpiraten.de/images/free-roblox-clothes-for-your-avatar_GM431946152.pdfIn PDF document text
    • https://wandpiraten.de/images/coin-master-hack-game-download-ios_GM406889139.pdfIn PDF document text
    • https://wandpiraten.de/images/will-minecraft-ever-be-free_GM479516143.pdfIn PDF document text
    • https://wandpiraten.de/images/earn-free-robux_GM431946152.pdfIn PDF document text
    • https://wandpiraten.de/images/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • https://wandpiraten.de/images/how-to-get-free-robux-on-phone_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_off000048fa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48FA 25204 bytes
SHA-256: 7e17745f10b583ebd5b41882324745f7f5c7e232d6ecd1cac7465fa343e9b579
font_01_sfnt_off000082cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82CC 17784 bytes
SHA-256: f5f16e9fe06415f99f9f196ec79e922628d3dac9c37f6a7894d79eeb781dffd0

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