Malicious PDF — malware analysis report

Static analysis result for SHA-256 b92f296bb167745a…

MALICIOUS

PDF

42.3 KB Created: 2021-05-17 16:04:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8769518d09c83561b4cb0f5750f2f9cd SHA-1: fcfc38db85a40730575f82815935a29afe3b3b31 SHA-256: b92f296bb167745a6801a55b0cb4aa2eef86cf886dfb9cad4860f2d0819d0d0c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links that point to known malicious redirector infrastructure, specifically targeting users with lures related to game hacks and free currency. The ML classifier also strongly indicated maliciousness. While no scripts were directly extracted, the PDF structure itself facilitates the redirection, likely leading to further malicious content or phishing pages.

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/free-coin-master-links-game-hack In PDF document text
    • http://w-i-r.de/images/_GM479516143.pdfIn PDF document text
    • http://w-i-r.de/images/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://w-i-r.de/images/microsoft-store-robux_GM431946152.pdfIn PDF document text
    • http://w-i-r.de/images/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://w-i-r.de/images/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://w-i-r.de/images/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • http://w-i-r.de/images/coin-master-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
    • http://w-i-r.de/images/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://w-i-r.de/images/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • http://w-i-r.de/images/coin-master-hack-apk-35-11_GM406889139.pdfIn PDF document text
    • http://w-i-r.de/images/how-to-get-20210-robux-for-free_GM431946152.pdfIn PDF document text
    • http://w-i-r.de/images/how-to-get-more-spins-on-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://w-i-r.de/images/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • http://w-i-r.de/images/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://w-i-r.de/images/real-coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://w-i-r.de/images/pig-master-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • http://w-i-r.de/images/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://w-i-r.de/images/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://w-i-r.de/images/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://w-i-r.de/images/coin-master-hack-unlimited-spins-apk-download_GM406889139.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_off00004c11.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C11 24512 bytes
SHA-256: 7bd638e77ccaef3f31cea1960a61d93ee96e83e99537807774e7aa2211adde4c
font_01_sfnt_off0000844e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x844E 17880 bytes
SHA-256: dfe41e252eeea42f6a4072e9595d4435e06b86b6ad2d398cb4b971b8bcb02477

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