Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb1811fb2ed8a87a…

MALICIOUS

PDF

45.5 KB Created: 2021-05-16 04:34:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b86ec5e9765349a166972225e7aee66f SHA-1: ab00e2087bea9c2fda2b178f6f1519e73f32c9c9 SHA-256: bb1811fb2ed8a87a32177348aadb66d94a9baed7dd0c69d89cfc7bd2f962997c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with promises of game hacks. The primary malicious URL identified is https://netcdn.xyz/app/406889139/coin-master-pet-food-hack-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a redirection-based social engineering attack designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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/coin-master-pet-food-hack-game-hack In PDF document text
    • https://www.elevage-chiot.fr/images/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • https://www.elevage-chiot.fr/images/comapp-trekfree-coin-spindaily-link-master_GM406889139.pdfIn PDF document text
    • https://www.elevage-chiot.fr/images/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • https://www.elevage-chiot.fr/images/how-to-get-creative-mode-in-minecraft-server-hack_GM479516143.pdfIn PDF document text
    • https://www.elevage-chiot.fr/images/how-to-o-get-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://www.elevage-chiot.fr/images/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • https://www.elevage-chiot.fr/images/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://www.elevage-chiot.fr/images/get-me-free-robux_GM431946152.pdfIn PDF document text
    • https://www.elevage-chiot.fr/images/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
    • https://www.elevage-chiot.fr/images/coin-master-hack-ios-download_GM406889139.pdfIn PDF document text
    • https://www.elevage-chiot.fr/images/appsmob-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.elevage-chiot.fr/images/master-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • https://www.elevage-chiot.fr/images/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://www.elevage-chiot.fr/images/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • https://www.elevage-chiot.fr/images/easy-robux-generator_GM431946152.pdfIn PDF document text
    • https://www.elevage-chiot.fr/images/free-robux-today_GM431946152.pdfIn PDF document text
    • https://www.elevage-chiot.fr/images/make-free-robux_GM431946152.pdfIn PDF document text
    • https://www.elevage-chiot.fr/images/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.elevage-chiot.fr/images/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • https://www.elevage-chiot.fr/images/coin-master-hack-extension_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a4e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A4E 24736 bytes
SHA-256: 09dbb3a83f0d9abe138c54c9104f76b0b0d6683463e62c94844342ed328e2aa5
font_01_sfnt_off00008242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8242 4020 bytes
SHA-256: dbaa9c12d07f3632734605f1d5d6dee3ad5af1f57488e46d95dab68b383f08c5
font_02_sfnt_off00008fc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FC9 18208 bytes
SHA-256: e18efbdce36ef150d5aaea8ad3152999d2cd8d64b44f09ee0731d2d38d7a34d6

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